What effect do body fossils have on how people understand dinosaurs? A)They show the types of food dinosaurs ate.
B)They give evidence of how prehistoric life behaved.
C)They let people know what dinosauts looked like.
D)The reveal how the dinosaurs raised their young.

Long term exposure to waves can cause sunburns and skin cancer.

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

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?