Which of the following is an affect of natural selection a. all of the children of two parents are male. b. carbon cycles through ecosystem. c. favoritable enviormental conditions cause an increased food supply. d. polar bears have white fur.

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

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?

2. which is the last step in the scientific method?