Speciation caused by geographic division is called A) allopatric speciation B) genetic speciation C) parapatric speciation D) sympatric speciation

A galaxy is made up of gas, dust, and many stars. what do all stars have in common

Homeostasis refers to A. the effect of natural selection on human evolution. B. a mixture or solution that is the same throughout. C. the tendency of a cell to maintain a stable internal environment. D.

Identify the subdivisions of the skeleton as axial or appendicular

During mitosis, what phase are chromosomes * not * visible?

Which factor decreases the rate of a chemical reaction? A. an inhibitor B. a co-factor C. increased substrate

What factors in the environment cause weathering

What do all cells in a multicellular organism have in common

One of your friends has decided to make it his life's work to characterize all functional proteins, as he is convinced that all possible amino acid combinations can result in a protein. is it possible to confirm his hypothesis in this way

A membrane-bound compartment inside chloroplasts and cyanobacteria that is the site of the light-dependent reactions of photosynthesis is

Which food supplies only discretionary kcalories? a. bagel b. peanut butter c. grape jelly d. raisins?