Speciation can arise through abrupt events, such as changes in chromosome number, or as a consequence of adaptation to different ecological niches. What is the term for the splitting or diverging of a population into two or more species? Which of the figures above represents this term?
A. Anagenesis; Figure A.
B. Anagenesis; Figure B.
C. Cladogenesis; Figure A.
D. Cladogenesis; Figure B.
E. Cladogenesis; Both Figure A and B can represent this term.
D. Cladogenesis; Figure B.
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Behavioral traits are useful in differentiating species because behaviors ____
a. are never genetically determined b. related to mating may create prezygotic isolation c. of fossilized specimens are easy to infer d. are independent of morphological characteristics e. are always learned
Which of the following does not result from commercial harvest?
a. birds in pet stores. b. deer in a nature reserve. c. fish in aquaria. d. lions in a zoo. e. elephants in a circus
It has been observed that when plants are subjected to extreme physical stress such as drought or high salinity, the transcription and activity of transposase genes increases. Increased transposase activity may
A) increase the rate of mutation under stressful conditions. B) aid in repairing DNA damage caused by stressful conditions. C) halt DNA replication and cell division. D) increase homologous recombination and genetic diversity. E) explain why some plants can't withstand drought conditions.
What products of light reactions of photosynthesis are used in the Calvin cycle?
A. glucose and oxygen B. carbon dioxide and water C. oxygen and protons D. ATP and NADPH E. ADP and NADP