Date Class Name: BIO 341 EXAM I SPRING 2018 a. fishes b reptiles c. small mammal

Question

Date Class Name: BIO 341 EXAM I SPRING 2018 a. fishes b reptiles c. small mammals d sof-bodied animals e marine invertebrates 12. What is an example of a limit on population growth, and proposed by Darwin to be a mechanism of evolution by eatural selection? a. predation b. inheritance of traits c. epidermal coloration d. resistance to infection e. spawning of hundreds of eggs 13. Which best species? describes a population that forms a new species within the same geographical region as the original a allopatric speciation b sympatric speciation c. parapatric speciation d autologous speciation e. heterogeneous speciation 14. What is a cladogram? a. A diagram of radioactivity b. A diagram showing lines of descent c. A demonstration of genetic variability d. A geographical distribution of organisms e. A similar stracture found in different organismes 15. DNA sequencing data suggest that evolutionary changes are related to an accumulation of a. index fossils. b. vestigial organs c convergent structures d. homologous structures e. changes in DNA nucleotide sequences 16. Two mammals, a sheep and a goat, produce offspring. Only the Fi and F2 generations produce fertile offspring. This oocurs as a result of b hybrid sterility. c. microevolution. d. hybrid inviability e. hybrid breakdown Capyright Cangage Leaming Powered by Cogner Page 3

Explanation / Answer

12. predation

13. sympatric speciation

14. a diagram showing line of descent

15. changes in DNA nucleotide sequence.

16. hybrid breakdown.

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