Guard cells are often associated with __________, special epidermal cells that provide a reservoir of

water and ions.
a. companion cells
b. cuticle cells
c. cork cells
d. sclerenchyma cells
e. subsidiary cells


E

Biology & Microbiology

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A single motor neuron and the population of muscle fibers that it innervates is called the:

A. motor unit. B. motor endplate. C. neuromuscular junction. D. excitation-contraction coupling. E. twitch fiber.

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The enhancement of a response to a stimulus following a novel pre-stimulus is called ____

Fill in the blank with the appropriate word.

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Describe at least 3 adaptations of modern whales adapted for a completely aquatic existence

What will be an ideal response?

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Much gene expression in multicelluar organisms focuses on quantitative gene expression of the genes

in various tissues. __________________ Indicate whether the statement is true or false.

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