The movement of 25-year-old fertile individuals between Mexico and Canada will eventually contribute to:
a. mutation.
b. gene flow.
c. genetic drift.
d. natural selection.
e. directional selection
b
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Which of the following functions is not directly provided by the human respiratory system?
A. olfaction B. gas exchange between the lungs and the atmosphere C. production of sounds D. transport of oxygen to the cells of the body E. maintaining blood pH homeostasis
At the top of a pyramid of biomass are the
a. primary producers. b. secondary producers. c. primary consumers. d. secondary consumers. e. tertiary consumers.
The opening of the uterus is the ____
a. ovary b. oviduct c. vagina d. cervix e. uterus
Mitochondria perform cellular respiration, a process that uses oxygen, generates carbon dioxide, and produces chemical energy for the cell
Which answer below indicates a correct pairing of material "burned" and the form of energy produced during cellular respiration? (a) fat, ADP (b) sugar, fat (c) sugar, ATP (d) fat, protein