What distinguishes a hypothesis from a theory? A. A theory is a scientific explanation. B. A theory is testable. C. A theory explains a natural phenomenon. D. A theory is backed up by repeated observations and tests.

In the suburbs, per capita consumption of fossil fuel is very high. What is most likely effect of this?

He red-pigmented protein found in red blood cells that binds oxygen and carbon dioxide for transport in the blood is

The first energy level is closest to the nucleus. true or false

Which statement best describes the density of the inner planets

In the study of human evolution, scientists define modern in terms of: a. traits like large browridges, large nasal sinuses, and a large masticatory complex. b.

Term that describes the hypogastric region of the abdomen with respect to the illiac region

A geologist found a sediment deposit at the open end of a valley. After studying the deposit, the geologist concludes the sediment was deposited by the front end of a glacier. There is a glacier in the valley, but it has melted back 2.

The membrane in the ear is named for what musical instrument

The earths core is made up mainly of what 2 substances? 2. Like an egg, Earth has a core, a layer surrounding the core, and a thin, hard outer layer. Which layers of the earth match the layers of an egg?

Pyruvic acid is the final product of glycolysis, which is the first stage of cellular respiration. Why is pyruvic acid never the end product of fermentation.