How does an endangered species differ from a threatened species?

Scientists can perform a process called polymerase chain reaction in the lab to copy DNA inside a test tube. This method is part of creating a DNA fingerprint of a suspected criminal. Cells from the suspect's cheek are placed into a tube.

How do fingernails prevent injury?

Over 99 percent of calcium in the body is found within the A. Bones and Teeth B. Stomach and small intestine C. Liver and spleen D. muscles and skin

if you couple has a problem with infertility are they unable to have children or are they having too many children

Hydrogen, carbon, and gold are examples of what?

What are two types of relationships that can result from coevolution?

Bob put a frozen fish on the stage of a dissecting scope because he wanted to observe the cells in the fish's eye. Bob saw nothing. Why?

Corn planted in a field that has been previously planted with legumes and then plowed under is likely to be

Plants that we recognize today spend the majority of their life in the A. haploid phase. B. gametophyte phase. C. seed phase. D. diploid phase

In which cycle does the virus to remain dormant? a. cell cycle b. protein synthesis c. lytic cycle d. lysogenic cycle