The circulatory system of a vertebrate that uses lungs for respiration has

A. Three or more loops.

B. No loops.

C. A single loop.

D. A double loop.

The major storage area for earth bound carbon can be found in

What is a reason that these data may be unreliable? It is information that is too old to be considered factual. It was found on the American Cancer Society website, and websites are unreliable.

A stream-like movement of ocean water far below the ocean surface is a

Why is species formation difficult to study? Two reasons preferred.

What was the gender of the individual's karyotype you examined? how did you know?

Which could be a reason viruses are considered nonliving things? Viruses come from cells. Viruses produce cells. Viruses are made of DNA and proteins, but not cells. Viruses attack cells and are dangerous to them.

How do humans become murderers? What are some of the reasons that cause it?

Relate sexual reproduction to evolutionary forces

Where is the glandular swelling on the earthworm found?

A student has a hamburger, french fries, and soda for lunch. Which sequence represents the correct order of events in the nutritional processing of this food?