The elaborate courtship rituals of many bird species help to preserve their genetic isolation through
A) behavioral isolation.
B) hybrid inviability.
C) allopatric separation.
D) temporal isolation.
E) mechanical incompatibility.
A
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First division nondisjunction will yield a gamete with an extra chromosome, whereas second division nondisjunction will yield a gamete missing a chromosome
A. true B. false
Which of the following is NOT a product of the Calvin cycle?
A. glyceraldehyde-3-phosphate (G3P) B. NADP+ C. ADP D. NADPH E. Pi
Development of an animal is connected to the genes that are expressed during development. What roles have been proposed for Hox genes in the evolution and morphology of animal species? Select all that apply.
_____ Variation in the number of Hox genes has led to the evolution of new animal species. _____ An increase in the number of Hox genes leads to an increase in the body size of an animal. _____ The greater the number of Hox genes the more complex the body plan of the animal. _____ The clustering of Hox genes has only evolved in vertebrates and is responsible for the evolution of vertebrae.
The electron transport chain begins to function when
__________ or __________ are oxidized. Fill in the blank(s) with the appropriate word(s).