The pressure required to stop water from moving across the membrane by osmosis is called
A. osmotic pressure.
B. mechanical pressure.
C. transport pressure.
D. crenation pressure.
E. atmospheric pressure.
Answer: A
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In some animals, such as the marsh wren, one male bird mates with several females. This is known as:
a. polygyny. b. polyandry. c. monogamy
d. a dominance hierarchy. e. codominance.
A mutation that results in a change in the codon-reading pattern could result from
A) either an insertion or a deletion of a base. B) a base substitution only. C) a base deletion only. D) a base insertion only.
The biconcave shape of red blood cells is determined by membrane-anchored internal proteins called
A. phospholipids. B. spectrins. C. cytoskeleton. D. clathrins. E. actin filaments.
Which of the following statements is TRUE?
a) once a person reaches maturity, cell division stops unless it is to repair a wound
b) cell division in an adult signifies cancer
c) some specific cells throughout the body retain the ability to divide & replace themselves
d) growth continues on throughout life of an adult human