A gene that specifies the fate of a particular anatomical segment in Drosophila is called a(n) ________
Fill in the blank(s) with correct word
selector gene
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Suppose an Rh- mother gives birth to an Rh- baby. Is there a danger of hemolytic disease of the newborn developing during a subsequent pregnancy? Why or why not?
What will be an ideal response?
The economic gap between rich and poor countries has narrowed over the last two decades
Indicate whether this statement is true or false.
What limits the frequency of action potentials?
A. chloride ions B. spike amplitude C. nodes of Ranvier D. refractory period
The outside of a neuron is positively charged at resting potential. Why do K+ ions leave the cell when K+ channels open during an action potential?
A. The diffusion gradient is the only factor that affects ion movement. B. K+ ions are actively pumped out by the sodium-potassium pump acting in reverse. C. Voltage-gated K+ channels open when membrane potential reaches +50 mV during the depolarization phase. The diffusion gradient and electrical force cooperate to drive K+ ions out of the cell. D. Negatively charged proteins leave the cell at the onset of the action potential.