Competitive exclusion is a result of:
a. interspecific competition.
b. intraspecific competition.
c. character displacement.
d. succession.
e. community complexity.
A
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Coprophagy is important for the nutritional balance of _____
A) ruminants such as cows B) insects and arthropods C) rabbits and their relatives D) squirrels and some rodents E) very large animals, such as elephants
The ozone layer is valuable because it blocks:a
heat. b. UV radiation. c. radio waves. d. asteroids. e. all of these.
The phospholipid molecules of most membranes have
a. a hydrophobic head and a hydrophilic tail. b. a hydrophobic head and a hydrophobic tail. c. a hydrophobic head and two hydrophobic tails. d. a hydrophilic head and two hydrophobic tails. e. two hydrophobic tails.
The chloroplasts of land plants are thought to have been derived according to which evolutionary sequence?
A) cyanobacteria ? green algae ? land plants B) cyanobacteria ? green algae ? fungi ? land plants C) red algae ? brown algae ? green algae ? land plants D) cyanobacteria ? red algae ? green algae ? land plants