You have some circular DNA in a tube and wish to introduce negative supercoils into it. However, you ran out of topoisomerase. Can you think of a way to do this usingDNA ligase and ethidium bromide

Why do organisms have to compete for resources

A nurse is caring for a 49-year-old client in the intensive care unit. the client was in a motor vehicle accident and is in severe pain. the client has been given morphine.

What is the ABO blood classification based on? a. antibody on the red blood cell b. antigen in the blood c. antigen on the red blood cell d. hemoglobin in the blood Sickle cell anemia is a condition where the red blood cells are deformed.

Deforestation is least likely to occur from which of these A. Logging B. Wildfires C. Argiculture D. Urban Sprawl

The map shows the distribution of wild boars in the United States. Wild boars are an invasive species to the United States. A map of the United notes showing the distribution of wild boars in dark orange.

An educate guess about the meaning of the term "chlorophyll"

All BUT one of the phrases describe a function of the human skeletal system. That is A) allows for movement. B) protects internal organs. C) produces red blood cells. D) filters unwanted substances.

Why is it important for cell division to occur?

Which of the following is true about the hierarchy or organization of life? (Check all that apply) A. Changes at the lowest level can affect the more complex levels. B. Cells make up tissues. C. Cells are made up of macromolecules. D.

Unwrapped food placed in a freezer experiences dehydra - tion, known as "freezer burn." why?