Which of the following is an important density-independent factor limiting population size?

A) Environmental resistance
B) Predation
C) Quantity of food
D) Weather
E) Competition


D

Biology & Microbiology

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Vertebrate skeletons are composed exclusively of rigid elements

A. true B. false

Biology & Microbiology

Plants transport water to their leaves through the xylem when water evaporates from the leaves. The evaporating water pulls other water molecules up the xylem through ____ .

A. Hydrophobic interactions B. Ionic bonds C. Covalent bonds D. Hydrogen bonds

Biology & Microbiology

A dance that recruits other bees into foraging

more than 100 meters distant from the hive is indicated by a. A. b. B. c. C. d. D. e. All of these except A.

Biology & Microbiology

When hermit crabs crawl across the ocean floor, they often have sea anemones attached to their backs. The anemones use their dangerous tentacles to keep hermit crab predators at bay, and they dine on the particles of food that the crab does not eat. This

is an example of A) bioremediation. B) alternation of generations. C) symbiosis. D) endosymbiosis.

Biology & Microbiology