In the following list of events required for muscle contraction, which occurs second? Group of answer choices calcium binds troponin action potentials spread along muscle cell membrane action potentials spread along motor neuron membrane Acetylcholine is released

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.