Homeostasis refers to ____
a. the ability of a cell to reproduce
b. directions the cell receives from DNA
c. the maintenance of a constant internal state
d. the extraction of energy from nutrients
e. the ability of organisms to move within their environment
ANSWER: c
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A disease is caused by homozygosity for the g allele (G is the corresponding wild-type allele). However, the penetrance of the disease is 75%. Two individuals known to be heterozygotes have a child. What is the probability that the child exhibits the disease?
A) 1/4 B) 3/4 C) 1/8 D) 3/16 E) 9/16
A mammal is and has a body temperature .
A. ectothermic; that changes with fluctuation in environmental temperature B. endothermic; that changes with fluctuation in environmental temperature C. ectothermic; maintained by its own metabolism D. endothermic; maintained by its own metabolism E. None of the answer choices is correct.
Is a virus alive?
A) Yes, it possesses all of the requirements for life. B) Yes, it possesses enough of the requirements for life to be considered living. C) No, it does not possess all of the requirements for life. D) No, it does not possess any of the requirements for life.
If the allele or genotype frequencies deviate from the values predicted by the Hardy–Weinberg principle, the
population is: a. growing. b. mutating. c. migrating. d. evolving. e. at equilibrium