Tuesday, 16 June 2020

Chapter 6: Support, Movement & Growth (Support, Growth and Stability in Plants)

Content Standard:
Support, growth and stability in plants

Learning standard:
Explain the support systems in terrestrial and aquatic plants.
Determine the age of woody plants.

Learning Activity:
Good morning class. Today we we are going to learn about support system in plants.
What is the support system in plants and why you think plants require support?
Now let us watch this video.
Video 1: Structure and function of stem
Video 2: Structure and function of root

A support system will help plants to stand vertically to obtain sunlight.
The support system ensures the leaves are exposed to sunlight to carry put photosynthesis.
Support is also needed to accommodate the plant weight and provide strength to withstand wind.

The main support for plants is the stem and root.
The plant stem - support its own weight and also the weight of leaves, flowers and fruits
The root- provides support to the plant by gripping the soil.
Question 1: Why do plants require support?

Now let us look at the support system of terrestrial and aquatic plants.
First, let us look at terrestrial plants. They can be divided into woody plants and herbaceous plants (non-woody).
Woody plants are usually big and tall.
The support system for woody plants is the hard, strong and tough woody tissue. It is built from lignin.
Non woody plants depend on stored water in the cells of the stem for support. These plants obtain their support from the turgidity of the cells. They are soft and they will wilt when they lack water. Now watch this video.
Video 3: Woody and Non-woody plants
Question 2: What are the differences between the support of woody plants and non-woody plants?

Some plants form a special structure to provide additional support, and some climb onto other support to obtain sunlight. Now let's look at the example below.
Video 3: Types of terrestrial plant roots
Question 3: State the type of roots that you watch in this video.

Next aquatic plants. They do not have woody tissue but they obtain their support from the water buoyancy force. Aquatic plants also have stems and leaves that have aerenchyma tissue. What is aerenchyma tissue? It consists of thin-walled cells and form air spaces in the aquatic plants. These buoyancy of these plants is aided by the air spaces.

Question 4: What are the differences between the support of the terrestrial and the aquatic plants?

How to determine the age of woody plants?
The most common method is to determine the growth rings that are present in the plant stem.
Now let us watch this video.
Video 5: How to determine the age of the tree
Question 5: From the video, state the method used to determine the growth rings that are present in the plant stem.

Please answer all the questions in the comments below. For examples:
Name:
Class:
Question 1:
Question 2:
Question 3:
Question 4:
Question 5:

That's all for today class. Thank you for your participation. Have a good day.
at

47 comments:

  1. Alvina Kue16 June 2020 at 10:30

    Name: Alvina Kue
    Class: 4B
    Question 1:
    - Plants require supports to accommodate the plant weight and provide strength to windstand wind.

    Question 2:
    - The differences between the support of woody plants and non-woody plants is woody plants are usually big and tall. The support system for woody plants is the hard, strong and though woody tissue. It is built from lighin. While non-woody plants depend on stored water in the cells of the stem for support. These plants obtain their support from the turgidity of the cells. They are soft and they will wilt when they lack water.

    Question 3:
    - Buttress roots and stilt roots

    Question 4:
    - The differences between the support of the terrestrial and the aquatic plants is aquatic plants do not have woody tissue for support, unlike the land plants. Aquatic plants obtain their main support from the water buoyancy force. Besides that, the aquatic plants also have stems and leaves that have aerenchyma tissue. The aerenchyma tissue which consists of thin-walled cells, from air spaces in the aquatic plants. The buoyancy of these plants is aided by the air spaces.

    Question 5:
    - Second method
    a) The tree is not cut but is bored using a special drill.
    b) The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    c) The drill bit is removed and the growth rings are counted.
    d) This method will save the tree from being cut.

    ReplyDelete
  2. Unknown16 June 2020 at 10:44

    Name: Allysandra Rainal
    Class: 4 Berdikari

    Question 1: Plants need support to help them stand vertically to obtain sunlight. The support system ensures the leaves are exposed to sunlight to carry put photosynthesis. Support is also needed to accommodate the plant weight and provide strength to withstand wind.

    Question 2: The support of woody plants are hard, strong and tough woody tissue while the support of non-woody plants are soft and they will wilt when they lack water.

    Question 3: buttress roots and stilt roots

    Question 4: The difference between the support of the terrestrial and the aquatic plants are aquatic plants do not have woody tissue but they obtain their support from the water buoyancy force while terrestrial plants have.

    Question 5: The method used is the second method which the tree is bored using a special drill and the tree is drilled to 75% of the drill depth or half the diameter of the tree. The drill bit is removed and the growth rings are counted. This second method will save the tree from being cut.

    ReplyDelete
  3. Unknown16 June 2020 at 11:10

    Name: Cynthia Tang
    Class: 4B

    Question 1: Accommodate the plant weight and provide strength to withstand wind and ensures the leaves are exposed to sunlight to carry put photosynthesis.

    Question 2: Non-woody plans are plants with very flexible stems. Their leaves and stems die down to soil level at the end of every growing season. Woody plants form a new layer of woody tissue each year, increase the diameter of the stem.

    Question 3: Buttress roots and Stilt roots

    Question 4: Aquatic plants are those live and thrive in water, they often root in the benthic medium undernearth the water. Terrestrial plants live entirely on land and would drown if submerged in water for more than a few hours.

    Question 5 : Second method
    -The tree is not cut but is bored using a special drill.
    -The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    -The drill bit is removed and the growth rings are counted.
    -This method will save the tree from being cut.

    ReplyDelete
  4. Unknown16 June 2020 at 11:12

    Name:Alyssa Carrie
    Class: 4 Berdikari

    Question 1:
    Plants need support to ensure that they grow upright and expose such as the leaves to sunlight to enable photosynthesis.Beside that, to support the weight of the plant.In addition, plants also need support to ensure the trees do not collapse due to environmental factors such as water and wind.


    Question 2:
    Woody plants have strong woody tissue that is build from lignin and vascular tissue for support.Non-woody plants such as balsam plants are soft,flexible and are not able to give sufficient support to the plant.


    Question 3:
    Buttress roots and Stilt roots

    Question 4:
    The difference between the support of the terrestrial and the aquatic plants is the aquatic plants have small,thin and flexible leaves so that the resistance against the water flow is low.In addition,these aquatic plants also light as there are only a few woody tissue in the stem.


    Question 5:

    The method used is the second method which the tree is bored using a special drill and the tree is drilled half the diameter of the tree. The drill bit is removed and the growth rings are counted. This second method will save the tree from being cut.

    ReplyDelete
  5. Unknown16 June 2020 at 11:26

    Name: Louis Ng
    Class: 4B
    Q1:for letting the plant to find sunlight
    Q2:Woody plant is strong while non woddy is not too strong but its more than enough to support itself
    Q3: Buttress root and stilt root
    Q4:Aquatic plant doesn't have woody tissue
    Q5:Second method the tree is bored by a special drill into 75% sweep of the tree

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:24

      Good. Q1, Q4 and Q5 answers are incomplete. Please refer to teacher answers.

      Delete
  6. Unknown16 June 2020 at 11:33

    Name:Esmerlyn Oh
    Class:4B

    Question 1:Help the plant to stand vertically to obtain sunlight.

    Question 2:The support system for woody plants is the hard, strong and tough woody tissue whereas non-woody plants depend on stored water in the cells of the stem for support.

    Question 3:buttress roots and stilt roots

    Question 4:Woody plants have woody stems and roots such as prop roots, stilt roots and buttress roots.Non-woody plants have support from turgidity of the cells, tendrils and clasping roots.Aquatic plants have hollow stem and buoyancy of water for support

    Question 5:Second method
    1.The tree is not cut but is bored using a special drill
    2.The tree is drilled to 75% of the drill depth or half.
    3.The drill bit is removed and the growth ring are counted.
    4.This method will save the tree from being cut.

    ReplyDelete
  7. Unknown16 June 2020 at 11:59

    Name: Phoebe Soh
    Class: 4B

    question 1: plants need support to help them stand vertically to obtain sunlight. The support system ensures the leaves are exposed to sunlight to carry put photosynthesis. Support is also needed to accommodate the plant weight and provide strength to withstand wind.

    question 2: the support of woody plants are hard, strong and tough woody tissue while the support of non-woody plants are soft and they will wilt when they lack water.

    question 3: buttress roots and stilt roots

    question 4: the difference between the support of the terrestrial and the aquatic plants are aquatic plants do not have woody tissue but they obtain their support from the water buoyancy force while terrestrial plants have.

    question 5: the second method is used to determine the growth rings that are present in the plant stem. The tree is bored by using a special drill and is drilled to 75% of the drill depth. Drill bit is removed and growth rings are counted. This method can prevent the tree from being cut.

    ReplyDelete
  8. Pan Xhing Yi16 June 2020 at 12:08

    Name: Pan Xhing Yi
    Class: 4B

    Q1: A support system will help plants to stand vertically to obtain sunlight.

    Q2: The support system for woody plants is the hard, strong and tough woody tissue. It is built from lignin. However，Non woody plants depend on stored water in the cells of the stem for support.

    Q3: roots that help stabilize, buttress roots on ceiba tree and mangrove.

    Q4: Terrestrial plants can be divided into woody plants and non-woody plants. Additional support in woody plants are the buttress roots, prop roots and stilt roots. For the non-woody plants, the additional support are tendrils, clasping roots and hollow stems. However, aquatic plants obtain their main support from the water buoyancy force.

    Q5:
    1. The tree is not cut but is bored using a special drill.
    2. The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    3. The drill bit is removed and growth rings are counted.
    4. This method will save the tree from being cut.

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:30

      Good. For Q3 & Q4, please refer to the answers provided in the comments below

      Delete
  9. Unknown16 June 2020 at 12:08

    Name:Jaqueenie Johny
    Class: 4 Berdikari

    Question1:The Plants needs support to help plants stand vertucally to obtain sunlight and Ensure the leaves are exposed to sunlight to carry out photosynthesis.Support system also needed to accommodate the plant weight and provide strength to withstand wind.

    Question2: The support of woody plants has hard,Strong and tough woody tissue while the non-woody plants are soft and they will wilt when they lack water.

    Question3: Buttress roots and stilt roots.

    Question4: The differences between the support of the terrestrial and the aquatic plants is aquatic plants do not have woody tissue for support, unlike the land plants. Aquatic plants obtain their main support from the water buoyancy force. The aquatic plants also have stems and leaves that have aerenchyma tissue.

    Question5: Second Method
    1.The tree is not cut but is bored using a special drill.
    2.The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    3.The drill bit is removed and the growth rings are counted.This method will save the tree from being cut.

    ReplyDelete
  10. Unknown16 June 2020 at 12:10

    Name: Louve Chew Ru Yee
    Class: 4 Berdikari

    Question 1: A support system will help plants to stand vertically to obtain sunlight. Besides that, the support system ensures the leaves are exposed to sunlight to carry out photosynthesis. Lastly, support is needed to accommodate the plant weight and provide strength to withstand wind.

    Question 2: The support system for woody plants is the hard, strong and tough woody tissue while non-woody plants depend on stored water in the cells of the stem for support.

    Question 3: Buttress roots and stilt roots.

    Question 4: Aquatic plants do not have woody tissue for support while terrestrial plants have. Besides that, the aquatic plants have stems and leaves that have aerenchyma tissue while terrestrial plants don't have it.

    Question 5: Second method. The tree is not cut but is bored using a special drill and is drilled half the diameter of the tree. The drill bit is removed and the growth rings are counted. This method will save the tree from being cut.

    ReplyDelete
  11. Jjjj16 June 2020 at 12:13

    Name: Wong sin thai
    Class 4b

    Q1:Because the support make sure the leaves are exposed to sunlight to carry put photosynthesis

    Q2:Woody plants made from hard, strong and tough woody tissue. It is built from lignin,non woody plants depends on water, and wilt when insufficient water

    Q3: buttress root and stilt root

    Q4:aquatic plants do not have woody tissue but they obtain their support from the water buoyancy force, while terrestrial plants are complete oppos6

    Q5: 2nd method bacause tree is bored being drilled to 75% drill deth by some drill, drill big removed and growth rings counted, this kind of method will save the tree being chopped.

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:33

      Good. Your answer still can be improved. Please refer to the provided answers.

      Delete
  12. Unknown16 June 2020 at 12:40

    Name : Mcdarren
    Class: 4B

    Question 1 :
    A support system will helps plants to stand vertically to obtain sunlight. The support system ensures the leaves are exposed to sunlight to carry out photosynthesis.

    Question 2 :
    The woody plants is hard, strong and tough woody tissue. Non-woody are soft and they will wilt when they lack water.

    Question 3 :
    Buttress roots and stilt roots.

    Question 4 :
    Aquatic plants do not have woody tissue for support, unlike the land plants. Besides that, the aquatic plants also have stems and leaves that have aerenchyma tissue.The aerenchyma tissue which consists of thin-walled cells, form air spaces in the aquatic plants.

    Question 5 :
    Second method :
    1. The tree is not cut but is bored using a special drill
    2. The tree is drilled to 75% of the drill depth or half the diameter of the tree
    3. The drill bit is removed and the growth rings are counted
    4. This method will save the tree from being cut

    ReplyDelete
  13. Unknown16 June 2020 at 12:42

    Name:Emmanuel Murang
    Class: 4B

    Q1
    -Plants need support so that it could stand straight, absorb water and food and to withstand harsh weather conditions.

    Q2
    -Difference are woody plants has hard, strong and tough woody tissue.It is built from lignin while non woody plants support system are soft and will wilt when they lack water.

    Q3
    -Buttres roots and stilt roots.

    Q4
    -Difference are aquatic plants do not have woody tissue but they obtain support from the water buoyancy force.

    Q5
    -The second method. This method consists of boreding a tree using a special drill and the tree will be drill either 75% of the drill or half diameter of the tree. Then, remove the drill bit and the growth rings are counted. Using this method will prevent this tree from being cut.

    ReplyDelete
  14. Unknown16 June 2020 at 12:49

    Name : Jenny Chen
    Class : 4B

    Question 1 : Plant need support stand vertically to obtain sunlight.The support system ensures the leaves are exposed to sunlight to carry put photosynthesis.
    Support is also needed to accommodate the plant weight and provide strength to withstand wind.

    Question 2 : The differences between the support of woody plants and non-woody plants is big and tall so the support system of the woody plants is hard , string abd though woody tissue . Non-woody plants depend on the stored water in the cells of the stem for support

    Question 3 : Buttress roots and stilt roots

    Question 4 : The differences between the support of the terrestrial and the aquatic plants is terrestrial plants get plenty of air so they usually have stomata on the bottkms of their leaves . While aquatic plabts havectheir leaves near or under the water , but they also need to breathe , aquatic plants have plentiful water to drink but nutrients may be scarce.

    Question 5 : The second method , the tree is not cut but using a special bored being drilled to 75% drill deth by some drill, drill big removed and growth rings counted, this kind of method will save the tree being chopped.

    ReplyDelete
  15. Jc16 June 2020 at 13:07

    Name: Jacky
    Class: 4B

    Q1 - A support system will help plants to stand vertically to obtain sunlight.

    Q2 - Difference are woody plants has hard, strong and tough woody tissue.It is built from lignin while non woody plants support system are soft and will wilt when they lack water.

    Q3 - Buttress roots and stilt roots

    Q4 - Aquatic plants are those live and thrive in water, they often root in the benthic medium undernearth the water. 

    Q5 - Second Method
    1. The tree is not cut but is bored using a special drill.
    2. The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    3. The drill bit is removed and growth rings are counted.

    ReplyDelete
  16. Unknown16 June 2020 at 13:10

    Name : Michelle Omunting
    Class : 4B

    Question 1:
    Plant need support so that it can growth upward and able to do photosynthesis and also needed to accommodate the plant weight and provide strength to withstand wind.


    Question 2:
    The differences between the support of woody plants and non-woody plants is woody plants strong, hard and tough woody tissue, while non- woody plants is soft and they will wilt when they lack water.


    Question 3:
    Buttress roots and stilt roots.


    Question 4:
    The differences between the support of the terrestrial and the aquatic plants are aquatic plants do not have woody tissue but they obtain their support from the water buoyancy force while terrestrial plants have.


    Question 5:
    Second method. The tree is not cut but is bored using a special drill and is drilled half the diameter of the tree. The drill bit is removed and the growth rings are counted. This method will save the tree from being cut.

    ReplyDelete
  17. Chan16 June 2020 at 13:37

    Name:Chan Xiu Yan
    Class :4B
    Q1:Plant need support so that it can growth upward and able to do photosynthesis and also needed to accommodate the plant weight and provide strength to withstand wind.

    Q2:The differences between the support of woody plants and non-woody plants is woody plants strong, hard and tough woody tissue, while non- woody plants is soft and they will wilt when they lack water.

    Q3:Buttress roots and stilt roots

    Q4:The differences between the support of the terrestrial and the aquatic plants are aquatic plants do not have woody tissue but they obtain their support from the water buoyancy force while terrestrial plants have.

    Q5:Second Method
    1. The tree is not cut but is bored using a special drill.
    2. The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    3. The drill bit is removed and growth rings are counted.

    ReplyDelete
  18. unknown16 June 2020 at 13:51

    Wong Yuet Er
    4B
    Q1- A support system will help plants to stand vertically to obtain sunlight. The support system ensures the leaves are exposed to sunlight to carry out photosynthesis. Support is also needed to accommodate the plant weight and provide strength to withstand wind.
    Q2- The support system for woody plants is the hard,strong and tough woody tissue. Non-woody plants depends on stored water in the cells of the stem for support.
    Q3- Buttress roots and stilt roots
    Q4- Aquatic plants dont have woody tissue but they obtain their support from the water buoyancy force while terrestial plants has woody tissue.
    Q5- Second method in which the tree is bored using a special drill and the tree is drilled to 75% of the drill depth or half the diameter of the tree. The drill bit is removed and the growth rings are counted. This will save the tree from being cut.

    ReplyDelete
  19. Unknown16 June 2020 at 14:06

    Name: Norafiqa Herins
    Class: 4B
    Question 1:
    - Plants require supports to accommodate the plant weight and provide strength to windstand wind.

    Question 2:
    - The differences between the support of woody plants and non-woody plants is woody plants are usually big and tall. The support system for woody plants is the hard, strong and though woody tissue. It is built from lighin. While non-woody plants depend on water.

    Question 3:
    - Buttress roots and stilt roots

    Question 4:
    - The differences between the support of the terrestrial and the aquatic plants is aquatic plants do not have woody tissue for support, unlike the land plants. Aquatic plants obtain their main support from the water buoyancy force. Besides that, the aquatic plants also have stems and leaves that have aerenchyma tissue. The aerenchyma tissue which consists of thin-walled cells, from air spaces in the aquatic plants. The buoyancy of these plants is aided by the air spaces.

    Question 5:
    - Second method
    a) The tree is not cut but is bored using a special drill.
    b) The tree is drilled to 75% of the drill depth or half the diameter of the tree.

    ReplyDelete
  20. Renee16 June 2020 at 14:36

    Name: Renee
    Class: 4B
    Question 1:to conserve space and fit more into the garden by growing plants up instead of out; to keep fruit and vegetables and foliage off the ground; to encourage a heavier crop; to help fruit ripen by lifting it into the sunlight

    Question 2: for woody plants is the hard, strong and tough woody tissue.
    Non woody plants depend on stored water in the cells of the stem for support

    Question 3: Buttress roots and stilt roots

    Question 4: aquatic plants do not have woody tissue but they obtain their support from the water buoyancy force but terrestrial plants have.

    Question 5: Second method
    The tree is not cut but is bored using a special drillThe tree is drilled to 75% of the drill depth or half.The drill bit is removed and the growth ring are counted.This method will save the tree from being cut.

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:41

      Good. But answer for Q1 is incorrect. Please look at the answer provided.

      Delete
  21. Unknown16 June 2020 at 14:53

    Name:Alan Chung Kha Shang
    Class:4 Berdikari

    Question 1:
    By providing durable supports for your plants to lean and climb on, you'll be able to: Conserve space and fit more plants into your garden. Encourage good air circulation and dry leaves, which helps to discourage pests and disease. Lift fruit toward the sunlight for ripening.

    Question 2:Woody plants with many branches close to the ground are called shrubs. Examples of shrubs are hibiscus shrubs and rose shrubs.So they are harder

    Question 3:Buttrees root and stilt root


    Question 4:Terrestrial plants generally have deeper winding roots through the soil. This is needed for stability and water absorbtion. They will perform co2 and oxygen exchange with the air as well. Aquatic plants generally have shallow roots only needed for stability as they can absorb water easily from their environment.


    Question 5:He is useing the 2nd method which is instead of just look over a cutted tree he drilled 75% od it and measeure the age and look at the comdition, with this method it would be easier and better

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:43

      good. Answers for Q1, Q2 and Q4 need to be improved.

      Delete
  22. Unknown16 June 2020 at 15:33

    Marc Ozem
    4 BERDIKARI

    Q1 = By providing durable support for your plants to lean and climb on . Encourage good air circulation and dry leaves , which helps to discourage pests and disease . Lift fruit towards the sunlight for ripening

    Q2 : Woody plant have cambium (the bark area ) which is a substance that give a three support so it can grow tall . The roots absorb water and minerals from the soil and anchor the plant to the ground and store food materials . Non-woody plants are plants with very flexible stems . Their level and stems die down to the soil level at the very growing season.

    Q3 : Buttress roots & roots of a mangroves tree

    Q4 : Terrestial plants ganerally have deeper winding roots through the soil . This is needed for stability and water absorbtion . They will perform co2 and oxygen exchange with the air as well . Aquatic plants generally have shallow roots only needed for stability as they can absorb water easily from their enviroment .

    Q5 : The method on the video is to determine the growth and the age of a tree without cutting it down . By using a special tool that called Increment Borer to drill inside the tree . The Increment borer bit is removed and the growth rings are counted .

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:44

      Good. Question 1- incorrect, Q2- can be improved

      Delete
  23. Yasmin Zulaikha16 June 2020 at 15:53

    YASMIN ZULAIKHA
    4 BERDIKARI

    QUESTION 1 :
    - Plant requires support because the support ensures the leaves are exposed to sunlight to carry out photosynthesis. Support is also accommodate the plant weight and provide strength to withstand wind.

    QUESTION 2 :
    - The support system of woody plants is the hard, strong and tough woody tissue that is built from lignin whereas non-woody plants, they depend on stored water in the cells of the stem for support by obtaining it from the turgidity of cells.

    QUESTION 3 :
    - fibrous root
    - buttress root
    - ground root

    QUESTION 4 :
    - Terrestial plants have stiff support tissues that hold the upper part of the plant above the ground whereas aquatic plants have their roots submerged in water that acts as a support.

    QUESTION 5 :
    - By using an increment borer to extract a section of wood tissue to determine the growth rings.

    ReplyDelete
    Replies
    1. Science Teacher16 June 2020 at 22:45

      good. For Q5, please refer to the answer provided.

      Delete
  24. Unknown16 June 2020 at 17:04

    Aaron Lai
    4 BERDIKARI

    QUESTION 1:
    -To ensure the leaves are exposed to sunlight to carry out photosynthesis and also accomodate the plant weight and provide strength to withstand wind.

    QUESTION 2:
    -The support system for woody plants is the hard, strong and tough woody tissue whilst non-woody plants depend on stored water in the cells of the stem for support from the turdgidity of the cells.

    QUESTION 3:
    -Fibrous Root
    -Buttress Root
    -Ground Root

    QUESTION 4:
    -Terrestrial plants have deeper roots through the soil for stability and water absorbtion whilst Aquatic plants have shallow roots that's submerged in water to act as a support.

    QUESTION 5:
    -The tree is not cut but is bored using a special drill and count the growth rings.

    ReplyDelete
  25. Unknown16 June 2020 at 19:37

    Name:Flaviea
    Class:4 Berdikari

    Question 1: Supports the plants to stand strength and supports to obtain sunlight.

    Question 2: The support system for woody plants is the hard, strong and tough woody tissue. While non-woody plants depend on stored water in the cells of the stem for support.

    Question 3: Buttress roots and stilt roots.

    Question 4: Terrestrial plants can be divided into woody plants and non-woody. Woody plants are usually big and tall while non-woody plants depend on stored water in the cells of the stem for support. Aquatic plants do not have woody tissue for support, unlike the land plants and it also obtain their main support from the water buoyancy force.

    Question 5: Second method. The tree is not cut but is bored using a special drill. The tree is drilled to 75% of the drill depth or half the diameter of the tree. The drill bit is removed and the growth rings are counted. This method will save the tree from being cut.

    ReplyDelete
  26. Science Teacher16 June 2020 at 22:05

    WELL DONE everyone. Here are the answers for you to refer to.
    Question 1
    1. help plants to stand vertically to obtain sunlight
    2. accommodate the plant weight and provide strength to withstand wind

    Question 2
    1. Woody plants- hard, strong and tough woody tissue
    2. Non woody plants- soft tissue and stored water in the cells of the stem for support and obtain their support from the turgidity of the cells.

    Question 3:
    1. Buttress roots
    2. Stilt roots

    Question 4:
    1. Terrestrial plants - woody tissue, no aerenchyma tissue, habitat on land
    2. Aquatic plants - no woody tissue, have aerenchyma tissue, habitat underwater/float on water

    Question 5
    1. The tree is not cut but is bored using a special drill.
    2. The tree is drilled to 75% of the drill depth or half the diameter of the tree.
    3. The drill bit is removed and the growth rings are counted.
    4. This method will save the tree from being cut.

    ReplyDelete

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