Consider the following statements about the photosynthesis 1 It takes place primarily in leaves and ...........

Science Affairs Botany

Consider the following statements about the photosynthesis:

1. It takes place primarily in leaves and partially in stems.

2. It takes place in the chloroplasts that have chlorophyll present in them.

3. There are tiny pores called nicotinamide adenine that function as roadways for CO2 to enter and O2 to leave the plant.

Select the correct answer using the code given below:

1 and 2 only

1 and 3 only

2 and 3 only

All of the above

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Explanation:

Stomata is a pore found in the epidermis of leaves, stems, and other organs, that facilitates gas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the stomatal opening. Air enters the plant through these openings by gaseous diffusion, and contains carbon dioxide and oxygen, which are used in photosynthesis and respiration, respectively. Oxygen produced as a by-product of photosynthesis diffuses out to the atmosphere through these same openings. Also, water vapor diffuses through the stomata into the atmosphere in a process called transpiration.