Which of the following whale species are recovering their population numbers as a result of whale harvesting regulations?I-right whalesII-Pacific gray whalesIII-sperm whalesIV-fin whalesV-humpback whales
A. I, II, and V
B. I and II
C. II and V
D. I, II, III, and IV
E. I, II, and III
Answer: C
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A. true B. false
All of the following are true about Earth's ozone layer EXCEPT:
A. It shields Earth from most ultraviolet radiation B. It is composed of O3 C. Its thickness has remained constant over time. D. CFC molecules can destroy ozone molecules E. It is predicted that a reduction of this layer will result in an increase in human skin cancer
Suppose that crossing-over during meiosis occurs within a region where one of the homologous chromosomes has an inversion with respect to the other homolog. Which chromosomal alterations would you expect to find in the gametes produced by this organism?
a. balanced translocations b. translocations c. both duplications and deletions
A monophyletic group has how many common ancestors?
A. One B. Two C. Three D. Many E. It is variable