Both the gnetophytes and the angiosperms possess vessel elements in their vascular tissue. is this an example of homology or convergence?

Which of the following statements correctly compares the earth's temperature and radiation?

How are directional selection and disruptive selection similar? how are they different?

What needs to be balanced in order for an ecosystem to thrive? * a. pollution and conservation b. humans and pollution c. nature and humans

Coal, petroleum, natural gas, and propane are fossil fuels. They are called "fossil fuels" because

What would be the first thing you would do if you were burned by a chemical a. apply the antidote for the chemical b. rinse the area with plenty of water c. wipe of the chemical with a dry cloth

The type of stress is most commonly associated with illness and disease is [blank] stress.

Describe the components of the peripheral nervous system and central nervous system and explain how they work together in your body.

Oil spills happen in our oceans. Some oils contain volatile organic compounds; these compounds make the oil denser.

Describe the overall changes in matter that occur during the light independent reaction.

Name two hormones that are also neurotransmitters using your knowledge