To which part of the DNA nucleotide do the letters A, T, C, and G refer?

A. The phosphate group

B. The nitrogen base

C. The deoxyribose

D. The amino acid group

Put the following terms in the order that oxygen passes through them to reach your blood: alveoli, lung, trachea, nose, bronchi.

Horses and donkeys mate successfully to produce mules, which are always sterile. which genetic isolating mechanism is involved here to prevent horses and donkeys from becoming a single species

Imagine we reach the year 2050 and we have surpassed the the projected global population. World wide we are running out of fresh water. Discuss how the human population may form a new species through evolution.

Which of the following adaptions made it possible for plants to surive on land?

All animals are heterotrophs. a. True b. False

Methods of include seeing for which a scientist could use a tool such as a microscope

An environmental group is opposing a proposed dam on a river. Damming the river would create a reservoir of water that could be used to supply drinking water to the surrounding community.

What ultimately controls the cell's production of proteins? A. DNA B. RNA C. protein D. allele

10. Briefly explain the secondary structure of a protein.

Which statement regarding fermentation is false? a. Fermentation produces lactate in heavily exercising muscle. b. At least one form of fermentation requires an enzyme with a thiamine pyrophosphate coenzyme. c.