Using 2 strains of pneumonia bacteria, Avery and his colleagues demostrated that the transforming factor in cells are

A. RNA

B. DNA

C. RNA polymerase

D. Phosphate groups

Which enzymes are responsible for the final chemical breakdown of carbohydrates, proteins, and nucleic acids?

Why are enzymes necessary? A. to slow the rate of decomposition B. to act as a catalyst in chemical reactions C. to conserve the stored energy of a cell

One of Darwin's principles is that minor variations in all traits exist within species. Why is this idea important to his theory of evolution?

In the first sentence the phase what called the greenhouse effects presents a / an a. bias b. cause c. illustration d. effect

The Krebs cycle is considered a cycle because?

According to this species-area curve for reptiles and amphibians on a west indian archipelago, a 50% decrease in area will change the number of species living in the remaining area by

How do organelles interact within a cell

How do we detect the energy of a wavelength?

How energy in gasoline is transformed in a lawn mower

Which observation was a sign that a chemical reaction was occurring in this experiment A) formation of a solid B) change in color C) formation of gas bubbles D) production of light