NEET BIOLOGY

PLANT PHYSIOLOGY

TRANSPORT IN PLANT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Keith puts a plant with white flowers in a container fi lled with green liquid for a few hours. After a day, he observes that the white flowers have turned green. What has caused the flowers to turn green?
A
The chlorophyll in the leaves turned the flowers green.
B
The flowers have been infected by a disease.
C
The roots absorbed the green liquid and transport it to the flowers.
D
The roots absorbed the green liquid and the stem transport the liquid to the flowers.
Explanation: 

Detailed explanation-1: -The white petals change colour because of something called the transpiration stream. Transpiration is the movement of water up the stem of a plant from root to leaf when water is lost from the plant due to evaporation and diffusion of water from a plant’s surface.

Detailed explanation-2: -A leaf is the green, flat lateral outgrowth in plants. They come in different shapes, sizes, and colors, and are generally dorso-ventrally flattened and thin. They are the main organ responsible for photosynthesis as they contain chlorophyll.

Detailed explanation-3: -The experiment which shows that food is transported through the phloem is Girdling experiment. In this experiment, the phloem tissue is removed, which results in the disturbance and blockage of the upward and downward movement.

Detailed explanation-4: -Answer : Transpiration; Water moves from the roots only upwards but food moves from the leaves upwards as well as downwards.

There is 1 question to complete.