Which of the following is considered a second-line defense?

A. circuatory

B. digestive

C. nervous

D. respitory

Which factor do oceanographers determine by measuring the conductivity of a sample of seawater?

Neptune's rings were most likely formed by:

What trait, besides flowers is unique

Which statement describes all types of matter? a. it takes up space and has mass. b. it is made of carbon, hydrogen, and oxygen. c. it is made of proteins and carbohydrates. d. it is composed of organic materials.

During what stage does the G1 S and G2 phase happen

Tell me what you think of adolescence as toddlerhood of adulthood

If a woman has blood type o and a man has blood type ab, what is the probability that they will have a child with blood type o?

What happens directly afther prophase?

What equation is used to determine the gene frequency for a given gene in a population?

During photosynthesis, oxygen is converted to carbon dioxide. True Or False?