What level of organization is the human heart?

Which units ate used to measure both velocity and speed? check all that apply

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?

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur