Explain how conservation efforts have positively impacted ecosystems.

How did Watson and Crick determine base pairing? A. They analyzed the work of Phoebus Levene. B. They used Chargaff's rule to fit the bases together. C. They broke the hydrogen bond. D. They observed the pairing under a microscope.

A mountain that forms when layers of lava and ash erupt and build up is a A. Caldera B. Volcano C. Vent D. Batholith

What does mammals means

What substance plays an important role in chemical weathering?

How is a nucleosome related to a chromosome?

Viruses cannot reproduce on their own and require a host organism to do it for them. This is one reason viruses are not considered to be alive

If the environment changes what is the first thing a species will do to survive

Rheumatoid arthritis is an autoimmune disease which causes the joints in the body to be constantly inflammed. This disease results when body tissues are A. attacked by one's own immune system. B. infected by a virus. C. infected by bacteria. D.

If you push a chair across the floor at a constant velocity, how does the force compare with the force you exert

A hiker climbs a hill. How does the potential energy of the hiker change as she climbs higher?