A scientist wants to compare DNA of two plants. What technique can she use to produce bands of DNA fragments for this comparison.

Lipopolysaccharide is an important cell wall component of

Koala's are diploid organisms where 2n=16. How many total pairs of sister chromatids are there in a koala cell that is in prophase of meiosis I? (consider a pair of sister chromatids as a single unit)

A scientist noticed that the number of salamanders in ponds in the Rocky Mountains was declining. This was a (n) a. hypothesis. c. observation. b. theory. d. control.

Can choose two of her three pairs of sneakers to take to a track meet. If the pairs of sneakers are called A, B, and C, which choice represents the sample space, S, for the event?

A topography map is used to study the changes in vegetation associated with different elevations. Which individual most likely uses them for this purpose? a scientist a businessman a government official a construction engineer

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?