A male produced from an unfertilized haploid egg is an example of what type of sex determination system?
A. X-Y
B. Z-W
C. X-O
D. Haplo-diploid
E. None of the answers are correct
D
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The sliding filament model of muscle contraction explains that:
A. Tropomyosin must be removed from the actin molecule before it can bind to myosin. B. Muscle contraction requires energy in the form of GTP. C. The sarcomere stretches to create contraction. D. Actin filaments slide past myosin, causing the shortening of the muscle fiber.
The villi in the human small intestine helps to maximize nutrient absorption
Indicate whether the statement is true or false.
Which of the following genotypes would not usually be represented in a gamete?
A) AA B) AB C) Ab D) aB E) ab
Peripheral proteins are linked to either surface of the plasma membrane by:
a. covalent disulfide bonds. b. associating with fatty acids through hydrophobic interactions. c. embedding in one side of the membrane and, thus, not extending through to the other side. d. associating with glycoproteins on the inner membrane surface. e. bonding to integral proteins through noncovalent interactions