Identical copies of genes that can be transcribed simultaneously are called
A. pseudogenes.
B. expressed sequences.
C. tandem clusters.
D. multigene families.
E. segmental duplications.
Answer: C
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Growth of a parasitic organism in or on the host is referred to as
A. colonization. B. infection. C. pathogenism. D. mutualism.
Weight training increases muscle mass by increasing the
a. amount of protein in individual muscle fibers. b. number of muscle fibers in each muscle. c. amount of glycogen in each muscle fiber. d. a and b. e. a and c.
Bacteria present in the digestive tracts of some herbivores function to:
a. provide bulk to their feces. b. produce minerals for their hosts. c. detoxify harmful materials found in the food. d. digest the animal waste products from the herbivore diet. e. digest the cellulose cell wall of plant cells.
What is the name of the main embryonic cell layer from which the nervous system is derived in most metazoans?
a. endoderm b. mesoglea c. mesoderm d. ectoderm