The system of plant and animal classification developed over 200 years ago and is still used today based on:

A. Acquired similarities
B. Structural similarities
C. Biochemical similarities
D. Environmental similarities

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.

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?