Biology 152 Exam 2 Review

A drawback of the BSC is that it cannot be applied to Select one or more: a. polymorphic species (like ants) b. asexual organisms like bacteria c. extinct organisms like dinosaurs d. none of these are drawbacks e. plants

a. polymorphic species (like ants) b. asexual organisms like bacteria c. extinct organisms like dinosaurs

Helianthus annuus and Helianthus petiolaris both share a common ancestor and live with overlapping territories. Both are well suited to their environment and are flourishing. A hybrid, Helianthus anomalus exists. It cannot interbreed with the parental species, but is well adapted to slightly drier spots (still in the same general geographical area). Which of the following concepts describes this situation? Select one: a. Founder effect b. A hybrid zone showing stability c. Adaptive radiation d. Bottleneck effect e. A hybrid zone showing reinforcement

b. A hybrid zone showing stability

It is thought that polar bears originated from a population of brown bears (grizzlies) that became geographically isolated during a glaciation event that occurred about 150,000 years ago. This is an example of: Select one: a. peripatric speciation b. allopatric speciation c. adaptive radiation d. sympatric speciation

b. allopatric speciation

______is the process in which two groups of organisms living the same habitat diverge into separate species Select one: a. adaptive radiation b. sympatric speciaiton c. co-speciation d. perpatric speciation e. adaptive radiation

b. sympatric speciaiton

What does the biological species concept use as the primary criterion for determining species boundaries? Select one: a. molecular (DNA, RNA, protein) similarity b. geographic isolation c. morphological similarity d. gene flow (the ability to exchange alleles and genes during reproduction) e. niche differences

d. gene flow (the ability to exchange alleles and genes during reproduction)

You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use? Select one: a. biological b. evolutionary c. ecological d. morphological

d. morphological

When you use a field guide to identify a species by its appearance, you are applying the Select one: a. ecological species concept b. Biological species concept c. Evolutionary species concept d. morphospecies concept

d. morphospecies concept

Two closely related populations of mice have been separated for many generations by a river. Climatic change causes the river to dry up, thereby bringing the mice populations back into contact in a zone of overlap. Which of the following is not a possible outcome when they meet? Select one: a. They interbreed in the region of overlap, but produce sterile offspring. b. They remain separate in the extremes of their ranges but develop a persistent hybrid zone in the area of overlap. c. They interbreed freely and produce fertile hybrid offspring. d. They no longer attempt to interbreed. e. They interbreed in the region of overlap, producing an inferior hybrid. Subsequent interbreeding between inferior hybrids produces progressively superior hybrids over several generations.

e. They interbreed in the region of overlap, producing an inferior hybrid. Subsequent interbreeding between inferior hybrids produces progressively superior hybrids over several generations.

Dogs (Canis lupus familiaris) and gray wolves (Canis lupus) can interbreed to produce viable, fertile offspring. These species shared a common ancestor recently (in geologic time) and have a high degree of genetic similarity, although their anatomies vary widely. Judging from this evidence, which two species concepts are most likely to place dogs and wolves together into a single species? Select one: a. ecological and morphological b. ecological and phylogenetic c. biological and morphological d. morphological and phylogenetic e. biological and phylogenetic

e. biological and phylogenetic

A bacteriologist is studying two asexually reproducing strains of E. coli. The two require different amounts of trace minerals for survival; on these grounds, the bacteriologist determines that they are separate species. In making his determination, he is using what species concept? Select one: a. evolutionary species concept b. morophospecies concept c. biological species concept d. none of the above e. ecological species concept

e. ecological species concept