Which of the following diseases is transmitted by the bite of human body lice?
A. bubonic plague
B. tularemia
C. Pontiac fever
D. trench fever
E. brucellosis
Answer: D
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Which statement does NOT distinguish Darwin’s theory of natural selection from earlier descriptions of biological
diversity and adaptive traits?
a. Biological diversity has purely physical, rather than spiritual, origins. b. Evolutionary change occurs in groups of organisms, rather than in individuals. c. Spiritual explanations account for the origin but not the diversification of individuals. d. Some organisms function better than others in a particular environment. e. Evolution is a multistage process and natural selection eliminates unsuccessful variations.
Which of the following features is unique to the Class Aves?
a) hair b) notochord c) wings d) shelled eggs e) barbules
Water constantly enters the cells of a freshwater sponge by osmosis. How is the sponge adapted to handle this problem? a. Contractile vacuoles expel fluid to the outside of each individual cell
b. Action of cilia in flame cells drives interstitial fluid into tubes, then out of pores at the surface. c. Extra water and wastes are transported into Malpighian tubules that route them out of the body. d. Water is excreted through tubular excretory organs called nephridia.
If an organism has three pairs of chromosomes,
how many possible combinations of homologous chromosomes could result from meiosis?
a. 2 b. 4 c. 8 d. 16 e. 32