____________________ and ____________________ used Neurospora in experiments that
demonstrated that mutations result in loss of enzyme activity. Fill in the blank(s) with the appropriate word(s).
ANS: Beadle; Tatum
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Pairing of homologues and crossing over occur during
a. anaphase I. b. metaphase II. c. prophase I. d. prophase II. e. telophase II.
Which of the following pairs is MISMATCHED?
A) animals; usually diploid B) fungi; usually diploid C) protozoa; usually diploid D) slime mold; usually haploid E) plants; usually diploid
Select the correct statement about the energy and/or nutrient that makes life possible.
A) both are recycled, nutrients when an organism dies and energy when it is eaten B) the sun provides energy in the form of heat C) producers obtain both energy and nutrients from the environment while consumers obtain both by using the tissues of producers or other organisms D) nutrients move through the ecosystem in a continuous directional flow E) all of the choices
Animals need two types of organic precursors from their food, __________, to serve as the raw materials for the synthesis of larger organic molecules.
a. organic hydrogen and organic oxygen b. organic carbon and organic nitrogen c. organic carbon and organic hydrogen d. organic carbon and organic oxygen e. organic nitrogen and organic oxygen