Closely related species that live in the same region may be isolated because:
A. there are slight differences in the niches that they occupy
B. their breeding seasons are not at the same time
C. any hybrid individual may be inviable or sterile
D. all of these
D. all of these
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The main organizing principle of hunting/gathering societies was:
A) ?class. B) ?agricultural production. C) ?kinship. D) ?language.
Altruism is only found among humans
a. True b. False Indicate whether the statement is true or false
Schultz's first stage of development is the __________ stage
a. teratogen b. juvenile c. infancy d. prenatal
Kpelle boys in Liberia undergo a four-year initiation period which includes __________
a. correct behavior with peers b. training in shooting rifles c. correct behavior with superiors d. walking on coals