The extinction of the dinosaurs occurred rapidly as a result of a single cataclysmic event
Indicate whether the statement is true or false.
ANS: F, over a 40,000 year period after an asteroid impact
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Which of the following microscope types would be least useful in viewing unstained living cells?
A. Phase contrast B. Interference C. Bright-field D. Dark-field
Why do species with large body sizes typically have lower population densities?
a. each large organism consumes more available resources b. there are not enough individuals to grow the population c. genetic diversity is low d. small organisms have more potential mates e. large organisms do not like living near one another
__________ are responsible for absorption and anchoring of a plant, while __________ are involved
in photosynthesis. a. Roots; leaves b. Stems; leaves c. Leaves; reproductive structures d. Reproductive structures; stems e. Roots; pollen
The potential capacity to produce offspring is called:a
life history traits. b. fitness. c. age structure. d. density. e. fecundity.