Upon finding a carcass, a raven will only call and attract other ravens to the food source if the ____
a. nearby ravens are relatives
b. food source is large and plentiful
c. food is found in a resident pair's territory
d. food is found in his own territory
e. food is being consumed by an animal of another species
ANSWER: c
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The human ancestor whose populations dispersed from Africa to other parts of the world was
(a) Homo sapiens (b) Australopithecus afarensis. (c) Pan troglodytes. (d) Homo erectus.
Which of the following is false about Marfan
syndrome? a. It results from an autosomal dominant mutation. b. The affected gene produces a defective form of the protein fibrillin. c. Aortas of Marfan's patients are susceptible to rupture. d. It affects one in five thousand men and women. e. None of these is false.
The above photomicrograph is of
a. mycelium. b. protistans. c. mycorrhizae. d. stolons. e. rhizoids.
Animal cells seperate their cytoplasm during cytokinesis when protein threads pinch the cell in half
a. true b. false