A cnidarian that builds a calcium carbonate skeleton is a(n)
A) crab. B) snail. C) clam. D) oyster. E) coral.
E
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A woman has a child using intrauterine insemination. The woman is the child's
A) gestational mother only. B) genetic mother only. C) gestational and genetic mother. D) gestational and surrogate mother.
The human X chromosome
a. is found in females. b. is found in males. c. carries different genes than the Y chromosome. d. interacts with a Y chromosome as homologues during meiosis. e. fits all of these descriptions.
Which of the following observations about flagella is true and is consistent with the scientific conclusion that the flagella from protists and bacteria evolved independently?
A) The flagella of both protists and bacteria are made of the same protein, but the configuration is different. B) The mechanics of movement and protein structure are the same in these flagella, but there are significant genetic differences. C) Although the mechanism of movement in both flagella is the same, the protein that accomplishes the movement is different. D) The protein structure and the mechanism of movement in protist flagella are different from those of bacteria flagella.
A shortage of cholesterol in the body could interfere with the formation of:
A) all of the choices are correct B) estrogen C) cell membranes D) testosterone E) progesterone