Comb shape in chickens is controlled by
A) the interaction of three alleles and codominance, resulting in four different phenotypes.
B) one gene with incomplete dominance, resulting in three different phenotypes.
C) the epistatic interaction of two genes, resulting in two different phenotypes.
D) the interaction of two genes with complete dominance, resulting in four different phenotypes.
E) None of these
D
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In the correct order from smallest to largest, list the levels of organization present in most animals.
What will be an ideal response?
Family, twin, and adoption studies have revealed a(n) _____________________ component to mental illnesses, such as bipolar disorder
Fill in the blank(s) with correct word
Experimenters replaced the statoliths in a crayfish statocyst with iron filings and then held a magnet above the animal. Based on your knowledge of the function of statoliths, what would they observe?
A. The crayfish stayed upright. B. The crayfish lay on its side. C. The crayfish turned upside down. D. The crayfish attempted to escape by rapidly swimming backwards. E. None of these choices are correct.
Which statement best describes autotrophic organisms?
a. Autotrophs are exemplified by fungi. b. Autotrophs are exemplified by animals. c. Autotrophs cannot carry out cellular respiration. d. Autotrophs depend on heterotrophs for food. e. Autotrophs synthesize complex molecules from CO2, water, and energy.