A microbiologist Gram stains a bacterium and finds the bacterium to be pink to red in color. This identifies the
A. bacterium as disease-causing organism.
B. species of bacterium.
C. bacterium as gram-positive.
D. bacterium as gram-negative.
E. bacterium as an endospore former.
D. bacterium as gram-negative.
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Rods and cones synapse with:
A. the optic neuron B. bipolar cells C. ganglion cells D. amacrine cells
Compare feeding in a sponge, a cnidarian, and an annelid
What will be an ideal response?
At night or in the shade
a. A predominates. b. B predominates. c. C occurs. d. D occurs. e. D occurs and A predominates.
Each ommatidium of the compound eye of an insect has a biconvex lens and a ____, which help focus light onto
photoreceptor cells known as ____. a. crystalline cone; retinular cells b. facet; ocelli c. rhabdome; cones d. sclera; rods e. cornea; rhodopsins