Most people with malaria exhibit chills and fevers every 48 to 72 hours. This is due to
A. waves of activity from the body's B and T cells.
B. the fusion of the male and female Plasmodium gametes to form new organisms.
C. the formation of Plasmodium gametes within the body.
D. the bursting of red blood cells in the body.
E. reinfection with new Plasmodium.
Answer: D
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Prokaryotic and eukaryotic cells generally have which of the following features in common?
A. A membrane bound nucleus B. a cell wall made of cellulose C. Ribosomes D. Flagella or Cilia that contain microtubules E. linear chromosomes made of DNA and protein
The movement of an action potential along a neuron is most like ________
A) the ripples created by dropping a pebble into a pond, gradually decreasing in size as the waves spread apart B) a crowd at a sporting event doing the wave around a stadium C) a radio tower emitting a signal that reaches only a small region D) the sound of your voice spreading out as you yell loudly to your friend while at a park
Helicobacter pylori can grow in the stomach because it
A) hides in macrophages. B) makes a capsule. C) possesses an enzyme that neutralizes HCl. D) makes HCl. E) invades epithelial cells.
Phylogenetic trees are used to:
a. construct hypotheses about common ancestors. b. construct hypotheses about how various species are related to each other. c. test hypotheses about the relationships between various species. d. All of the above.