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Based on this table that lists the advantages and disadvantages of dam-and-reservoir systems, name one advantage, and one disadvantage that is most important. Explain why you think each of those is most important. Answer in complete sentences and make sure you include one advantage and one disadvantage.

Advantages
Provides irrigation water above and below the dam
Provides water for drinking
Reservoir useful for recreation and fishing
Can produce cheap electricity (hydropower)
Reduces downstream flooding of cities and farms

Disadvantages
Flooded land destroys forests or cropland and displaces people
Large losses of water through evaporation
Deprives downstream cropland and estuaries of nutrient-rich salt
Risk of failure and devastating downstream flooding
Disrupts migration and spawning of some fish

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).