Put these events in the correct chronological order 1. end-plate potentials trigger action potentials 2. transverse tubules convey potentials into the interior of the cell 3. acetylcholine binds to receptors on the motor end plate 4. binding sites on actin are uncovered allowing myosin to bind and carry out power strokes

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.