Which base is found only in DNA?

adenine

guanine

cytosine

Othymine

Opossums are solitary animals that usually meet in nature only to mate. What is their probable distribution pattern?

During what phase and what subphase of the cell cycle does chromosome replication occur

In humans, there are three alleles for blood type: a, b, and o. a and b are codominant over o. suppose jim, a man with type a blood, and leah, a woman with type b blood, have a child, winnie. jim's parents both have blood type ab.

What is the difference between the biological term fitness and the common meaning of the common meaning of the world?

Diffusion of oxygen from an alveolus into a pulmonary capillary belongs to which aspect of respiration?

If you were in a boat as Hurricane Sandy passed overhead on October 28 at 4am, at what altitude would Polaris appear in the sky from your location (32°N and 73°W) ?

Which instrument would provide the most detailed information about the internal structure of a chloroplast

Staind yeast were added to a paramecium culture, and some of the yeast were ingested by the paramecia. this activity is most closely associated with which life function A) synthesis B) regulation C) nutrition D) growth

Which statement is true? Sediment can be any size. Sediment is only small particles of sand that settle out of the water. Sediment doesn't move from the place where it was formed. Sediment in the wind is too small to cause damage.

The small outpouchings that protrude from the intestinal lumen are called