Which of the following animals is a genetic male?
A. bird ZW
B. grasshopper XO
C. honeybee diploid
D. Drosophila XXY
B. grasshopper XO
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The results of this experiment, shown on the left of the graph (area A), may be used to _____
A) show that these plants can live without gibberellin B) show that gibberellin is necessary in positive gravitropism C) show that taller plants with more gibberellin produce fruit (pods) D) show a correlation between plant height and gibberellin concentration E) study phytoalexins in plants
Homologous chromosomes have the:a
same length but differing genes. b. same shape but differing genes c. the same genes but differing shapes. d. same genes but differing lengths
e. same length, shape, and genes.A deficiency in the enzyme G6PD confers resistance to the disease _______________. Fill in the blank(s) with the appropriate word(s)
As cleavage continues during frog development, the size of the blastomeres _____
A) increases as the number of the blastomeres decreases B) increases as the number of the blastomeres increases C) decreases as the number of the blastomeres increases D) decreases as the number of the blastomeres decreases