Question

D. Give reasons for the following:
1. Trees on mountains are pointed and needle-like.
2. Plants in the deserts have no leaves but thick stems.​

Answer 1

Answer:

1.The trees growing in hilly areas have needle-shaped leaf blades because it rains heavily in these regions and the needle-shaped leaves help the rainwater and snow to slide off easily. ... So, plants that grow near the ground have broad leaf blades to capture as much sunlight as possible.

2.The leaves and stems of many desert plants have a thick covering that is coated with a waxy substance, allowing them to seal in and protect what moisture they already have. ... The smaller or fewer leaves a plant has, the less water is lost during transpiration since ithas less surface area open to the sun and wind

Explanation:

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Answer 2

The trees growing in hilly areas have needle-shaped leaf blades because it rains heavily in these regions and the needle-shaped leaves help the rainwater and snow to slide off easily. ... So, plants that grow near the ground have broad leaf blades to capture as much sunlight as possible

The leaves and stems of many desert plants have a thick covering that is coated with a waxy substance, allowing them to seal in and protect what moisture they already have. ... The smaller or fewer leaves a plant has, the less water is lost during transpiration since ithas less surface area open to the sun and wind.