Defining features of the halobacteria include ________.
A. the production of methane
B. absolute dependence on a high concentration of NaCl for growth
C. absolute dependence on temperatures above 65ºC for growth
D. absolute dependence on low pH conditions for growth
Answer: B
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The morphological species concept would relate more to
a. prezygotic isolation. b. postzygotic isolation. c. both prezygotic and postzygotic isolation d. neither prezygotic nor postzygotic isolation e. it would depend on the species used for the study
RNA serves to convert the information stored in DNA to ________.
A. carbohydrates B. lipids C. RNA D. protein
Insufficient production of growth hormone by the anterior pituitary may result in
A) diabetes insipidus. B) a drop in blood glucose levels. C) acromegaly. D) dwarfism. E) gigantism.
In species that reproduce via external fertilization:
a. males do not have to compete with each other for access to a female's eggs b. only females provide parental investment, in the form of the nutrition present in the egg c. sexual selection does not operate d. sperm and egg encounter each other outside of the female's body, typically in an aquatic environment e. none of these