The failure of a pair of chromosome to separate during anaphase is referred to as:
A. inversion.
B. translocation.
C. trisomy.
D. nondisjunction.
E. disjunction.
D
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The enzymes that deal with toxic oxygen-containing molecules is/are
A. glycolase. B. superoxide dismutase. C. catalase. D. cytochrome oxidase. E. superoxide dismutase AND catalase.
An ecosystem is defined as
A. the set of environmental resources that each organism requires for survival, growth, reproduction, etc. B. the sum of living organisms and nonliving environmental components in an area. C. the physical place and environmental surroundings in which individual organisms live. D. all of the members of all of the species living in an area. E. all of the individuals of the same species living in an area.
What represents the most basic level of chemical organization?
a. cell b. atom c. tissue d. molecule e. organism
Which of the following are used by cyanobacteria for reproduction?
A. Fragmentation B. Binary fission C. Budding D. All of the choices are correct.