Terrestrial Habitats

Q. Why do desert plants have small leaves or leaves that have been reduced to spines?

1. To bear more flowers
2. To absorb more water from the atmosphere.
3. To minimise water loss through transpiration
4. To reduce the rate of photosynthesis.

Q. Cacti can survive in 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 of waxy substance, which helps to prevent evaporation of water.
c. The roots are distributed on the surface to absorb water.
d. Leaves are modified into spines to prevent loss of water.

1. Both a and b are wrong.
2. Both b and c are wrong.
3. a is wrong but b is correct.
4. a, b and d are correct.

Q.

The animals that live on land are known as___.

Q. What are the adaptations found in desert plants? (Any 2)

Q.

Which of the following are adaptations of cacti for life in the desert?

1. Broad leaves

2. Both options B and C

3. Fleshy succulent stems

4. Carbon dioxide stored during night

Q.

What are tendrils? From which part it can arise.

Q.

Assertion (A): In Cactus, leaves are reduced to small spines with less surface area.
Reason (R): Spines helps in preventing the cactus from losing water through evaporation.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is NOT the correct explanation of A
3. A is true but R is false.
4. A is false but R is true

Q. Certain properties are mentioned below. Find a leaf corresponding to each property and describe those plants.[Textbook Question 6 pg no. 15]

leaves with smooth surface, leaves with rough surface, fleshy leaf, spines on leaf.

Q. The ______ of a cactus plant helps in storing water and food.

1. leaves
2. roots
3. seeds
4. stem

Q. The cacti are found in extremely dry weather such as deserts. True/False?

1. True
2. False

Q. What are the plants found in UAE and how do they synthesis glucose and oxygen?

Q. In the desert areas plants have thorns instead of _____________.

1. stem
2. bark
3. bud
4. leaf

Q. Modified stem( Runners ) are terrestrial or both terrestrial and aquatic?

Q. Based on the given adaptaions of a plant, identify the habitat of the plant.
1. It has a cone shape.
2. It has sloping branches.
2. It has needle like leaves.

1. Oceans
2. Mountains
3. Ponds
4. Deserts