Which best describes how long it usually takes for speciation to occur?

several days

several generations

several years

one generation

Why is it important that a plant's phloem extends into its leaves? A. The phloem allows carbon dioxide to enter the leaf and oxygen to escape it during photosynthesis. B.

What is the function of the interstitial cells in the testes?

Cells play an important role in the structure and function of organisms. Which of the following is not a principle of the cell theory? a. Cells are the basic units of life. b. All living things are made of cells. c. Very few cells reproduce. d.

High level of ketones in the blood can lead to

During a routine prenatal care visit, a pregnant woman in her last trimester of pregnancy reports that she has occasional shortness of breath. the nurse instructs her that:

Which primary symptom does the nurse identify as a potentially fatal complication of epidural or intrathecal anesthesia?

Which of these is directly involved in transporting nutrients from the sugar solution into the yeast?

Why do we get a crunchy granular feeling when we chew pear fruit

The Sun's ___ is only visable during a solar eclipse

Explain how and why the thylakoids are able to make ATP in the dark.