Suppose you traveled back in time and located the first animals to have evolved feathers. You found that these animals were tree-dwelling ectotherms, able to run quickly but unable to fly. You also noticed that only males had feathers
Which hypothesis of feather evolution would these data most support? Feathers initially evolved in a role associated with _____. A) flight
B) insulation
C) sexual selection
D) gliding
C
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In negative feedback, the variable being regulated is changed in the _______ direction, while in positive feedback the variable is changed in the ________ direction.
A. same, opposite B. decreasing, increasing C. negative, positive D. inhibitory, stimulatory E. opposite, same
The process by which CO2 is released through the oxygenase activity of rubisco is called ____
a. photosynthesis b. photophosphorylation c. phosphorylative oxidation d. photorespiration e. oxidative phosphorylation
The specific discipline that linked Mendel's and Darwin's work was ____
a. population biology b. paleontology
c. population genetics d. biogeography e. modern synthesis
The biome at the top of a very high mountain at the
equator is a type of a. alpine tundra. b. taiga. c. savanna. d. mountain coniferous forest. e. arctic tundra