Which of the following is a behavioral pattern that results from a proximate cause?
A) A male sheep fights with another male to improve its social position and find a mate.
B) A female bird lays its eggs when day length begins to shorten.
C) A cat kills a mouse to obtain food.
D) A cockroach runs into a crack in the wall and avoids being stepped on.
E) A goose squats and freezes motionless to escape a predator
Answer: B) A female bird lays its eggs when day length begins to shorten.
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The type of biome characteristic of an area depends mainly on rainfall and temperature. Which biome gets the most rainfall?
1.forests 2.grassland 3.shrubland 4.tundra
A "de facto" wilderness is an area that
A. is legally classified as wilderness. B. contains only small human settlements. C. is gradually returning to wilderness conditions. D. is wild but not legally recognized or protected. E. was once developed but no longer has human development.
Which class of animals has the largest number of species?
A. Arachnida B. Insecta C. Gastropoda D. Bivalvia E. Arthropoda
_________________ produces new species and _________________ takes them away.
A. Extinction; speciation B. Speciation; extinction C. Background extinction; mass extinction D. Gradual change; punctuated equilibrium