Mason and Clark concluded that starlings who decorated their nests with wild carrot sprigs did so as an adaptation responding to ________
a. competition for mates
b. wild carrot as a nutritious source of food
c. the need to camouflage nests from nestling-eating ravens
d. parasitism of the brood by bloodsucking mites
d
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Winogradsky columns are used primarily for enrichment of
A) aerobic cultures, although occasionally anaerobes do appear. B) anaerobic cultures, although occasionally aerobes do appear. C) aerobes, anaerobes, and phototrophs. D) phototrophs, although occasionally heterotrophs do appear.
The malarial stage infecting red blood cells of humans are the:
A. merozoites B. sporozoites C. saprophytes D. gametocytes E. neophytes
Select the feature which is involved in the clotting process.
A. Platelets B. Fibrin C. Both platelets and fibrin D. Neither platelets nor fibrin are involved in the clotting process
What causes the furrow during cleavage?
A) It is a depression caused by the formation of a new cell wall. B) A ring of contractile protein fibers pinches the cell in two. C) Connecting proteins that had been binding adjacent cells together now dissolve. D) A loss of water occurs.