After treatment of a plasmid and a DNA fragment of interest with restriction enzymes, a researcher wishes to anneal the cohesive ends and covalently link the fragment into the plasmid. What enzyme will be needed?

Which of the following organisms is located only in the third trophic level of the soil food web

2. An adaptive advantage of having a three-chambered heart, as found in amphibians, over the two-chambered heart of fish is thatA. there are capillary beds in both the respiratory organ and body systems of amphibians but not fish. B.

What are enzymes used in the body for?

Why do scientists that that photosynthetic prokaryotes were probably not the first life forms on earth

Alcohol is A. A drug B. An anti depressant C. A hallucinogen D. All of the above

Albinism, lack of pigmentation in humans, results from an autosomal recessive gene designated a. two parents with normal pigmentation have an albino child. what is the probability that their next child will be albino?

A light ray is striking the surface of the Earth. Which factors would make the light ray more likely to be absorbed than reflected? Check all that apply.

Hydroelectric power does not require moving water as dams hold water back.

Describe how the Blackland Prairie is situated within Texas?

What are the three different types of skin cancer