Q96 of 367 Page 27

The opening and closing of the stomatal pores depends upon :

A. The guard cells regulate the opening and closing of stomatal pores. They swell, when water flows into the guard cells and stomatal pores get opens. Similarly, when the guard cells lose water, they shrink, become straight and the stomatal pores get closed.

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94

The internal energy (cellular energy) reserve in autotrophs is:

 95

Which of the following events does not occur in photosynthesis?

 97

Most of the plants absorb nitrogen in one of the following forms. This is:

Options;


A. proteins


B. nitrates and nitrites


C. urea


D. atmospheric nitrogen

 98

The first enzyme to mix with food in the digestive tract is :