Why does air come out of a leaf when it is in hot water?

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?

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

Explain how this example of pesticide resisitance in ticks is an example of biological evolution