Which of the following terms refers to the maintenance of the body's internal environment at relatively constant levels?
a. feedback
b. homeostasis
c. natural selection
d. physiology
Ans: b. homeostasis
Biology & Microbiology
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Which of the following organelle(s) has/have a genome separate from the genome in the cell nucleus?
A. mitochondria B. chloroplasts C. nucleolus D. both the mitochondria and chloroplasts E. both the mitochondria and the nucleolus
Biology & Microbiology
Which substance binds more tightly than oxygen to hemoglobin?
a. nitrogen b. carbon dioxide c. hydrogen d. helium e. carbon monoxide
Biology & Microbiology
The genotype Aa is referred to as
a. heterozygous. b. incompletely dominant. c. homozygous recessive. d. homozygous dominant. e. codominant.
Biology & Microbiology
The evolutionary explosion of new species from a common ancestor is
A. adaptive radiation. B. convergent evolution. C. divergent evolution. D. gradualism.
Biology & Microbiology