Which statement about ion channels and voltage-gated ion channels is true?
A) Voltage-gated ion channels are always open.
B) Ion channels allow ions to flow against their concentration gradients.
C) Voltage-gated ion channels only open when a stimulus is applied.
D) Ion channels do not contribute to resting membrane potential.
Answer: C
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If a botanist hybridizes two pea plants with purple flowers and a resulting plant produces white flowers, the white flowers are considered a ______ trait.
a. recessive b. regressive c. dominant d. hybrid
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a. crocodilians c. turtles b. prosimians d. lizards
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