What are the end products of cellular respiration?

Diffusion and osmosis are forms of passive transport

What is a group of organisms that are closely related and share similar characteristics

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?