The energy in living systems is used by organisms for what purpose?

Most scientific questions are based on opinions. hypotheses. observations. experimental data.

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

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?