Modification of Stem

Q.

The cactus stems are modified into

1. Phyllodes

2. Phylloclades

3. Cladodes

4. Thorns

Q.

Which of the following are edible underground stems?

1. Potato

2. Turmeric

3. Ginger

4. Groundnut

Q.

Name one stem that has food stored in it?

Q.

What is the role of leaf tendril?

Q. Underground stem is found in:

1. Potato
2. Garlic
3. Onion
4. All of the above.

Q.

Underground stem that stores food

Q.

How does an aerial stem propagate? Give an example.

Q.

If we want to grow potato and ginger in our garden, which part of the plant should we use?

1. Leaf

2. Bud

3. Root

4. Stem

Q. Corm, rhizome and tuber are ________ modifications.

1. underground root
2. aerial stem
3. underground stem
4. underground leaf

Q.

Following are some features of plants.

(i) They lose a lot of water through transpiration.

(ii) Their leaves are always broad and flat.

(iii) They lose very little water through transpiration.

(iv) Their roots grow very deep into the soil.

Which of the combination of the above features are typical of desert plants?

1. (i) and (ii)

2. (ii) and (iv)

3. (ii) and (iii)

4. (iii) and (iv)

Q.

Which of these stem modifications are seen in aquatic plants?

1. Sucker

2. Offset

3. Runner

4. Stolon

Q. Which one of the following is an example of a sub-aerial modification of the stem?

1. Agave
2. Oxalis
3. Asparagus
4. Tridax

Q.

How do aerial stems help in reproduction?

Q. Stolon is an example of:

1. Sub-aerial stem modification
2. Underground stem modification
3. Underground root modification
4. Sub-aerial root modification

Q. Sub-aerial stem modifications help the plants in

1. Storage of food
2. Protection from grazing animals
3. None of the above
4. Vegetative propagation

Q.

Identify the errors in given statements.
During photosynthesis, released carbon dioxide escapes through the stomata.

Q. List the main characteristics of organisms living in the desert habitat.

Plants	Animals

Q. Assertion [A]: Cactus does not perform photosynthesis.

Reason [R]: Spines are present in cactus.

1. A is true and R is false
2. A is false and R is true
3. Both A and R are true and R is a correct explanation for A
4. Both A and R are true but R is not the correct explanation for A

Q.

In Eichhornia, the purpose of stem modification is

1. Water storage

2. Vegetative propagation

3. Photosynthesis

4. Defense

Q.

Aerial roots are a common characteristic for plants found in ___.

1. deserts

2. wetlands

3. hills

4. plains

Q.

Stem connects all parts of the plant i.e. the parts under the ground as well as those above the ground.

1. True
2. False

Q. Money plant is a climber.

1. True
2. False

Q. Megha and Farheen were performing an experiment on plant reproduction. They both placed a potato in the soil and observed the changes after a few days. Which of the following will they observe?

1. Young shoots will rise from the potato.
2. Both A and B
3. Young roots will rise from the potato.
4. Potato will increase in number.

Q.

Cacti survive in a desert because:

a. It has a flat green stem to store water and prepare food by photosynthesis.

b. The stem is covered with a thick layer, which helps to preserve water.

c. Its roots are distributed on the surface to absorb water.

d. Leaves are modified into spines to prevent loss of water.

1. Both b and c are wrong

2. a is wrong but b is correct

3. a, b and d are correct

4. Both a and b are wrong

Q. Arrange the following steps of tuber growth in the correct manner.

1. Buds grow
2. Shoot develops
3. Tuber initiation
4. Tuber develops

Q.

Tendrils of pea is a modification of the stem.

1. True

2. False

Q. Plant prey defense includes which one of the following?

1. Sharp spines
2. Pointed leaves
3. Tough leathery leaves
4. All of these

Q. Why the eyes of potato tuber are called axillary buds ?

Q. What is the bud in the grafting method called?

(a) Stock
(b) Graft
(c) Scion
(d) None of these

Q.

What are shrubs ?