What are reasons to jeep your heart rate low

Although animals share many common characteristics, there is also a great amount of diversity found in animals. which animals are ectothermic, obtain dissolved oxygen in water through gills, have scales, have fins, and live in water?

Explain why you believe physician assisted suicide should or should not be legalized in more states across the us.

True or false a fertilized cell divides many times to form an embryo