New York State Chemistry RegentsNew York State Earth Science Regents

Living Environment Regents June 2004 Question 23 PDF Print E-mail
Organization of Life


Correct Answer: (3) maintenance of a dynamic equilibrium through detection and response to stimuli

Guard cells are specialized epidermal plant cells that form the boundaries of the stomata. They regulate the speed of transpiration by opening and closing the stomata and so preventing excessive water loss.

Incorrect Answers:

Nerve cells and receptor sites are found in more complex organisms like animals.

The guard cells have no direct effect on the rate of growth of the plant.

Water is an abiotic factor.


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