Which organ is essential in circulating oxygen throughout the body?

a. liver

b. heart

c. lung

d. kidney

In an ocean ecosystem, seabirds are predators of fish. What would happen to the balance of an ocean ecosystem if the number of seabirds decreased? A. The population of fish in the ecosystem would increase. B.

Event 1 Event 2 Which event is most likely an example of a chemical reaction? Event 1 because there is a color change. Event 1 because there is a release of heat and light. Event 2 because the temperature is dropping in the liquid.

Imagine you have discovered a new species of bacteria. To begin your investigation of this organism, you run an assay on the total nucleotide content of the bacterial RNA.

Where does a bacterial cell store its dna?

E. coli grown in the presence of lactose, but absence of glucose, will use the enzyme beta-galactosidase to digest lactose. How are these cells different from cells which are grown in the absence of lactose and presence of glucose

A client is admitted with thrombocytopenia. which specific nursing actions are appropriate to include in the plan of care for this client?

If you look at the sky and see the Moon as a half-circle, what do you expect should be true about the tides that day? A. The low tides will be much lower than usual. B. The high tides will be much higher than usual. C.

What are the five evidences that a chemical change has taken place?

In frogs muscle tissue is usually grouped into large

after the brain receives information from the body's sensory receptors, what is the next step in responding to this information?