The sliding filament model of contraction involves . Group of answer choices actin and myosin sliding past each other and partially overlapping the shortening of thick filaments so that thin filaments slide past actin and myosin lengthening in order to slide past each other the Z discs sliding over the myofilaments

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?