Why are structures within plant and animal cells called organelles?

Are the alps and the appalachians the same

Two of the 20 commonly occurring amino acids contain a sulfur atom. Identify the most direct source of the sulfur atom in these amino acids in humans. A. Coenzyme B. A Tetrahydrofolate C. Biotin D. Homocysteine E. glutathione

The structure of a cell nucleous would be seen in the greatest detail by use of

What adaptation do the roots of mangroves have that make them well-adapted to life in the wetlands? Their roots are long enough to reach the deepest areas past the continental shelf.

Which of the following has become today's major cause of mass extinction? A. Adaptive radiation B. Human activities C. Addition of new species

Describe two communication differences between the nervous system and endocrine system.

Process that takes place at mid-ocean ridges A. Sea-floor spreading B. Continental drift C. Magnetic reversal D. Magnetic minerals E. Fossils

The molecule contains carbon, hydrogen, and oxygen in uneven rates the molecule must be

Write a paragraph about soil conservation to be read as a public service announcement on radio stations.

Do you believe that dogs have evolved from wolves?