Ecologists are studying the fire coral population in a 280-square-kilometer area on the great barrier reef. fire corals cannot move from one location to another in their environment.

which of the following methods is most appropriate for the ecologists to use to determine the size of the fire coral population?

a. counting all the fire corals in the total area to determine the precise number of individuals in the population

b. determining the size of the fire coral population in a quadrat sample area and using it to estimate the overall population size

c. using a mark and recapture method to estimate the overall population size

d. tagging individual fire corals and returning the following year to count how many are still in the same area

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Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).