Which of the Following Cell Types Is Responsible for the Cell-

question 20

Multiple Choice

Which of the following cell types is responsible for the cell- mediated immune response?

• A)T cells
• B)B cells
• C)natural killer cells
• D)leukocytes

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Definitions:

Phototropic Response

the growth or movement of a plant organ toward or away from light, as a response to its direction.

Phytochrome

A blue-green, proteinaceous pigment involved in a wide variety of physiological responses to light; occurs in two interconvertible forms, Pr (red-absorbing phytochrome) and Pfr (far-red-absorbing phytochrome).

Bolting

The production of a tall flower stalk by a plant that grows vegetatively as a rosette (growth habit with a short stem and a circular cluster of leaves).

Gibberellins

A group of plant hormones that regulate growth and influence various developmental processes, including stem elongation, germination, and flowering.