Which characteristic would exclude an animal from being an amphibian? they have lungs. they have a cartilaginous skeleton. they are ectothermic. they have a three-chambered heart. they have vertebrae?

What are some of the roles that appendages of the skin play in maintaining body homeostasis?

What is the nutrient broken down in the small intestine?

Which of these is a trait that has probably been selectively bred for by human beings? A. eating bamboo in panda bears B. speed in horses C. breathing air in dolphins D. flying in bats

How are mammals and birds similar?

Which daily exercise contributes the most to the major components of health-related physical fitness?

Which surface of the ocean current has the warmest water a. peru current b. north atlantic drift c. brazil current d. canary current

A forest habitat contains a great deal of plant and animal life. Using the forest habitat as a model, explain the difference between species richness and relative abundance. Discuss how each affects the survival and fitness of populations.

Sort the bones based on whether they belong to the appendicular skeleton or the axial skeleton.

Abnormally low levels of the neurotransmitter serotonin are associated with:

You are in a body of water where freshwater flows into the ocean. Which ecosystem is this?