Question

In which of the following the rate of transpiration is high?
A. CAM plant
B. C3 plants
C. C3 and C4 plants
D. C4 plants

Answer 1

Hint:Almost 85 percent of all plants on the Earth are this kind of plants, including wheat, rice, soybeans and all trees. In these plants the chloroplasts do not lie on bundle sheath cells.

Complete answer:
>Like other living things, plants often need an excess water discharge system. The practice through which extracts excess water from the plant body is known as transpiration. It is the water from the surface of the leaves that usually evaporates. Water molecules are removed from the aerial parts of plants during the transpiration process. For growth and development, only a limited amount of water consumed by plants is used. In the process of transpiration, the rest is eliminated. The rate of transpiration refers to the quantity of water lost during a certain period of time. By opening and closing stomata, plants control the transpiration rate.
>CAM plants are adapted to dry environments, including cacti and pineapple, using the CAM pathway to minimize photorespiration. CAM plants are suited to dry environments. These plants have a very low transpiration rate.
>A normal plant with no photosynthetic adaptations to photorespiration is called C3. Almost 85 percent of all plants on the Earth are this kind of plants, including wheat, rice, soybeans and all trees. The transpiration rate in C3 plants is high which needs to open stomata to inhale carbon dioxide for photosynthesis and lower the concentration.
>C4 plants physically distinguish light-dependent reactions and the Calvin cycle. The cells of the mesophyll and the Calvin cycle are light-dependent in special cells around the leaf veins.

Thus, the correct answer is option B. i.e., C3 plants.

Note:Transpiration is about the process of water movement in plants and evaporation through leaves, stems and flowers, and it mainly occurs when the stomata are opened for exchanges between carbon dioxide and oxygen. The transpiration rate is determined by its influencing factors and includes temperature, sunlight, wind and humidity.