11. Which statement would be an observation? A Female fruit flies are better able to adapt to changing temperature conditions. B If the temperature deviates greatly from room temperature, then more female fruit flies will survive. C More male fruit flies were living at the end of 3 hours when the temperature was 21.1 degrees Celsius. D More male fruit flies will be found living inside homes than outside, where there are more fluctuations in temperature. ​

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).