How does the contractile vacuole in a single-celled organism function to maintain homeostasis?

A) It pumps water into the cell.

B) It pumps water out of the cell.

C) It pumps solutes into the cell.

D) It pumps solutes out of the cell.

A husband and wife both have cleft chins, and when you look at their four children, three also have cleft chins; however, one does not.

People that have a single allele (gene copy) for sickle cell anemia are typically not sick from the disease and are said to be carriers of sickle cell trait. these people will more often live in the malaria belt of sub-saharan africa.

What would happen if the cell membrane were not selectively permeable.

Proteins play a vital role in all cells. in fact, cells need thousands of proteins in order to function properly. the synthesis of these proteins is primarily directed by

Human microbiota resides in the a. intestines. b. kidneys. c. liver. d. cerebral spinal fluid.

The information encoded in DNA is used within a cell in a two-stage process. The two stages of this process are called A) replication and transcription. B) transcription and translation. C) denaturation and renaturation.

Is Down Syndrome more common in a certain group of people? How common is it?

In which stage do vertebrate embryos or offspring show the most similarities? A. Earliest stages B. Middle stages C. Just before birth D. After birth

Suppose you are an astronomer, and a child asks you to explain the organization and structure of the universe. In your own words, describe the matter found in the universe and the relationship between stars, galaxies, and planets

How do the lungs of spiders differ from human lungs?