Which best describes a theory?

A. a well-supported conclusion

B. a proven fact

C. an educated guess

D. an untested claim

Before experimental drugs can be brought to market, they must undergo many rigorous trials to ensure they deliver their medical benefits effectively and safely.

What is the source of energy for nearly all life on earth

How can prokaryotic cells affect the health of the human body? Check all that apply. They can sustain good overall health. They can have no noticeable effect. They can be harmful. They can control genetic diseases.

Under which circumstances must facilitated diffusion be used instead of simple diffusion?

Que es la migracion para los animales?

Where does an eagle get the energy it needs to grow and to a fly? A. from the animal eats B. from the trees it nests in C. from the air it flies in D. from the water at fishes in

Describe how the motion of Earth is affected by the sun. Be sure to include the direction of any force you identify and the shape of the path that results.

For a person to be diagnosed with major depressive disorder, he or she must have experienced a significant depressive episode and depressed characteristics, suchas lethargy and hopelessness, for at least

When earth completes a full rotation how much time has elapsea a. 1 day b. 1 month c. 1 week d. 1 year

Which is a problem associated with a declining population size? A. An aging population B. Scarce food supplies C. Limited health care