In the sensory system, the rods and cones are collectively referred to as...

a. photoreceptors
b. ganglion cells
c. color visions receptors
d. the fovea


Answer: a. photoreceptors

Biology & Microbiology

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Which is the last structure that a sperm travels through before it leaves the body?

a. ureter b. urethra c. vas deferens d. vas efferens e. epididymis

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The cell-mediated response

a. involves helper T cells. b. involves the action of antibodies to destroy invaders. c. acts only on extracellular pathogens. d. results in the production of clones of B cells. e. includes all of these.

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A systematic way of obtaining knowledge about the natural world is ____

a. science b. an hypothesis c. an experiment d. the variable e. a prediction

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The only mammalian cells that do not have a nucleus are ___.

What will be an ideal response?

Biology & Microbiology