You excavate a fossil of a small reptile during a paleontology field trip. It has the following characteristics: skull with a pair of dorsal temporal openings and a pair of lateral temporal openings; bipedal with legs positioned directly under the pelvic girdle. Dating with radioisotopes shows that the specimen lived 100 million year ago (MYA). You conclude that the specimen belongs to which reptilian group (be specific as possible)?
A. Anapsid
B. Dinosaur
C. Archosaur
D. Synapsid
E. Diapsid
Answer: B
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What is a disadvantage of using fossils to reconstruct phylogenetic history?
A. Fossils are a physical record of organismal structure. B. Fossils yield information about the timing and order of events in the past. C. Fossils reveal relatedness. D. The probability of fossilization varies among species.
Four of the five factors listed below are limits to
achieving a population’s full biotic potential. Select the exception. a. lack of nutrients b. predation c. exponential growth d. competition for space e. waste buildup
The Hawthorne and apple maggot flies appear to have become reproductively isolated from each other
largely because:a. they occur on different sides of the Mississippi River. b. they have different mating behaviors. c. they occupy different parts of the habitat. d. they have adapted to two different hosts. e. they mate at different times of the day.
A xenograft is graft tissue from a donor of one species transplanted to a recipient of another species.
Answer the following statement true (T) or false (F)