What is the theory on how cells came to have mitochondria.

When studying moose foraging behavior, you note that moose spend some time eating aquatic plants even though the leaves of deciduous trees along the shore have higher energy content. what might explain this observation?

10. Briefly explain the secondary structure of a protein.

Which environmental problem is NOT caused by deforestation? A) increased atmospheric CO2 B) soil erosion C) urban sprawl D) reduction of wildlife habitat

Which statement best describes the compounds of nucleic acids

5. Tactile receptors are especially abundant A. in the feet. B. in the face. C. in the lips. D. around the heart.

Creationists criticize the idea of natural selection as a circular argument, or tautology, claiming "The fittest are those that survive, and survival is how fitness is defined." Why is our definition of natural selection not tautological? a.

Atoms combine to form what? A. elements b. proton c. molecules

A blastocyst is a group of cells that forms after a human egg is fertilized. The blastocyst consist of two types of cells. Some of these cells develop into all of the cells of a growing fetus. What do the other cells develop into? A.

Select the atoms that are likely to lose electrons to form cations: A. Iodine (I) B. Lithium (Li) C. Bromine (Br) D. Potassium (K)

How does a law differ from a theory? A. A law is a theory that has been proven to be true and universal. B. A theory is a group of hypotheses that prove a law is true. C. A law is a statement of fact, but a theory is an explanation. D.