Teleosts have a bewildering variety of patterns of sex change, but protogyny and protandry are the most common. Describe the evolutionary principle that underlies those two patterns
What will be an ideal response?
The principle is Darwinian fitness: that is, how does an individual maximize the number of viable offspring in succeeding generations? If large individuals can produce more eggs than small individuals, it may be advantageous to be protandrous because a small male can produce enough sperm to fertilize all the eggs a large female can produce. But if only individuals that can defend a territory or a harem are able to breed, protogyny is advantageous because a small female can live in the territory of a male, and when it is large it may have an opportunity to change sex if the territorial male dies.
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Explain how the right side and left side of the heart cooperate as a double pump
What will be an ideal response?
Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive
Indicate whether this statement is true or false.