The various characteristics of organisms that result from their genetic makeup are collectively referred to as an organism's ________
Fill in the blank(s) with correct word
phenotype
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If you applied a toxin that blocked non-voltage-gated potassium channels (i.e., the potassium "leak channels") in a resting neuron, it would cause the membrane potential to be
A. less negative. B. more negative. C. No change would be observed.
________ are responsible for the transmission of a signal between two adjacent nerve cells.
Fill in the blank(s) with the appropriate word(s).
The three types of muscle tissue are cardiac, skeletal, and ___________
Fill in the blank(s) with the appropriate word(s)
The primary advantage of gills versus the body surface for gas exchange in aquatic animals is that ________.
A. gills are located near the mouth B. gills decrease resistance to movement C. all gills contain a countercurrent exchange system D. gills have a much greater diffusion surface area