On a phylogenetic tree, what do the branch lengths represent?

The age of the organisms

amount of genetic change since divergence

amount of genetic change since convergence

The age of divergence

Which of the following metabolic conversions involved in glucose synthesis requires the direct expenditure of ATP? a. 3-Phosphoglycerate - -> 1,3-bisphosphoglycerate b.

3. Meiosis is sometimes called reduction division. What does this mean and why is it important to a species?

Each cerebral hemisphere is divided into frontal and parietal lobes by: a. the oblique sulcus b. the longitudinal fissure c. the central sulcus d. none of the above

List several mutagens that can increase the frequency of mutations

Which statement correctly describes part of the atomie model? O A Electrons are in a cloud outside the nucleus. B Protons are in a cloud outside the nucleus. O G. The nucleus is on the outside of the atom.

Which artery is felt when taking the pulse at the wrist?

How does skin prevent entry of micro organism in the body

Hank likes to explore nearby streams during the summer. However, one winter there is a lot of rain near the stream. How might the stream change before the next summer? A. The stream will have dried up. B. The stream water will be shallower. C.

A woman with rheumatoid arthritis has taken leflunomide for 1 year. she telephones a nurse and says that the result of a home pregnancy test was positive. the nurse should:

Which of Mendel's laws or principles states that gametes carry one allele for each trait?