HORTICULTURE

HORTICULTURE SCIENCE

ULTRA STRUCTURE OF PLANT CELLS AND ORGANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following shows an adaptioon of many plants that live in cold areas?
A
Have large flat leaves to absorb heat all year round
B
Lose their leaves in winter to conserve heat
C
Have pneumatophores to absorb extra oxygen through frozen soil
D
increase photosythesis during winter to produce more heat
Explanation: 

Detailed explanation-1: -By dropping their leaves, plants reduce their surface area that is exposed to the cold, drying air as well as save water in the plant itself. This is an important process since the nutrients that were in the leaves are broken down and returned back into the soil.

Detailed explanation-2: -Cushion plants-these are compact, low growing plants. These characteristics help them to survive in cold and windy conditions. They trap airborne dust and use it as a source of nutrients. Arctic poppy-this has a hairy stem to retain heat.

Detailed explanation-3: -So, the correct option is ‘Reduced surface area to volume ratio’.

Detailed explanation-4: -They are known as deciduous trees and coniferous trees. Deciduous trees lose their leaves in the winter.

There is 1 question to complete.