The volume of air normally breathed in and out of the lungs in a single breath at rest is referred to as the _____ volume.

A. tidal
B. total
C. reserve
D. inspiratory reserve
E. expiratory reserve


A. tidal

Biology & Microbiology

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The amniotic egg of reptiles, birds, and mammals is an adaptation to

(a) thwart carnivorous predators. (b) allow life on land. (c) compensate for the short period of development of the young. (d) protect the young from the nitrogenous wastes of the mother during embryonic development.

Biology & Microbiology

Which of the following is an example of resource competition?

a. male garter snakes vying for access to females b. cardinals and starlings fighting over seeds in a bird feeder c. interactions between parasites and their host d. lions hiding near a water hole to capture prey

Biology & Microbiology

Which of the following is an example of a noncommunicable infectious disease?

A. Influenza B. Urinary bladder infection C. Diabetes mellitus D. Strep throat

Biology & Microbiology

Perpetually young tissues where cells retain the

ability to divide are

a. vascular. b. meristematic. c. protective. d. photosynthetic. e. all of these

Biology & Microbiology