The flow of energy among living organisms is best
characterized as
a. circular.
b. a ladder.
c. a lattice.
d. one way.
e. a funnel.
Answer: d
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What are possible mechanisms of action for phagocytes? Select all correct choices
A. They can engulf and digest pathogens with lysosome-enclosed enzymes. B. They can destroy pathogens via the production of reactive nitrogen species. C. They can specifically target and kill virusinfected cells. D. They can form membrane attack complexes (MACs).
Which of the following blood cells are derived from megakaryocytes?
a. red blood cells b. monocytes c. platelets d. neutrophils
If you view a cell in which the genetic material is beginning to be visible as separate bodies, and the nucleolus has disappeared from view, you may surmise that the cell is in
a. telophase. b. anaphase. c. prophase d. metaphase e. interphase.
How does a macrophage (immune cell) consume a bacteria?
A. exocytosis B. pinocytosis C. receptor-mediated endocytosis D. endocytosis E. phagocytosis