A carrier for a disease
A) is homozygous for the dominant mutation.
B) is homozygous for the recessive mutation.
C) is heterozygous for the dominant mutation.
D) is heterozygous for the recessive mutation
E) is hemizygous for any mutation.
D
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Which would be more likely to cause illness-a water sample that tested positive for coliforms or one that tested positive for E. coli O157:H7?
A. Both would be equally capable of causing illness-all coliforms cause illness. B. The coliform positive sample would be more likely to cause illness. Coliforms are inherently more pathogenic than the weak O157:H7 lab strain of E. coli. C. The E. coli O157:H7 sample would be more likely to cause illness. This strain of bacterium is highly pathogenic and capable of causing kidney damage. D. Neither-there is usually a small amount of coliforms (including E. coli O157:H7) in all water.
What type of animals live in a multigenerational family group in which sterile workers carry out all tasks essential to the group's welfare, while other members of the group produce offspring?
a. selfish herd b. eusocial animals c. dominance hierarchy group d. social animals e. monogamous animals
The structures that connect neighboring cardiac muscle cells to ensure rapid electrical conduction are
a. desmosomes. b. intercalated discs. c. synapses. d. endothelial cells. e. smooth muscle cells.
A system that compensates for pH fluctuations by donating or accepting H+ is known as a(n) ____
a. acid b. base c. salt d. buffer e. antioxidant