Imagine you genetically engineered a neuron to produce voltage-gated Na+ and K+ channels that had the same opening times in response to a change in voltage. How would that change the recording above?
A. The peak voltage would be higher.
B. The peak would occur over a longer period
of time.
C. The period of hyperpolarization would be
longer.
D. No action potential would be generated.
E. Threshold values would increase.
D
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If the recombination frequency between two genes is close to 50%, what could be true about the location of the two genes? (Select all that apply.)
A) They are on nonhomologous chromosomes. B) They are far apart on the same chromosome. C) They are very close together on the same chromosome. D) None of the choices could be true.
Mucous membranes and tears contain antimicrobial substances such as _____.
What will be an ideal response?
Estuaries receive nutrients both from tides and from streams and rivers
Indicate whether the statement is true or false
The first recognized vascular plant fossil was derived from the extinct genus ________, which had leafless stems with simple, forked branches of equal size.
A. Lycopodium B. Cooksonia C. Marchantia D. Equisetum E. Spirogyra