Which stage of the Plasmodium protozoan infects the red blood cells of humans to cause malaria?
a) Schizont
b) Merozoite
c) Sporozoite
d) Gametocyte
Ans: b) Merozoite
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The photo below of Australian sawfly caterpillars is used as an example of:
1.Colonial living
2.Pheromone signaling
3.Social defensive behavior
4.Polygamous mating systems
Do the two DNA double helices following DNA replication have the same, or a different, composition?
a. different b. same
Which of the following elements were MOST likely the electron donors and electron acceptors of early microorganisms?
a. NADH / O2 b. NADH / fumarate c. NO2- / O2 d. H2 / S0
An Italian physician, ________, challenged the concept of spontaneous generation by demonstrating that maggots do not arise from decaying meat but rather from developing fly eggs.
Fill in the blank(s) with the appropriate word(s).