The cardiovascular system, which transports blood through the body, is a one-way system.

a. True

b. False

Organisms that have foreign DNA inserted from a different species are called

What features show that homo erectus walked just like a modern human?

What would happen if diploid organisms reproduce by sexual reproduction without first producing sex cells through meiosis?

Tuberculosis (TB) is an example of an infectious disease that has been largely controlled in developed countries like the United States but remains a major cause of death in developing countries.

How many blood moons have we had?

Which charterstic makes the nine amino acids essential

What can scientists infer about the period of very early Earth from the lack of fossilized remains of oxygen breathing animals and the dominance algae?

What part of the cell membrane that recognizes chemical signs

What is a called when organisms that cannot make their own energy-rich molecules?

How did Mendel make the F1 generation for his experiments?