The cells that develop to form the outer lining of an animal's body make up the _[blank]_.

blastula

ectoderm

endoderm

mesoderm

The scientific study of heredity is called

When water vapor condenses how much heat energy will be released into the atmospher

Which explanation best explains the role of enzymes as catalysts in living systems? A. Enzymes accelerate chemical reactions without getting used up in the process. B. Enzymes accelerate chemical reactions by getting used up in the process. C.

Compared to those in high-income nations, people in low-income developing nations: do not develop "lifestyle" diseases. are more likely to die from infectious diseases. develop more genetically-based diseases.

When a virus invades the body, some B cells recognize it as nonself and produce plasma cells that release a substance to kill the virus. What is this substance called?

List three movements for which a relative angle at a particular joint is important and three movements for which the absolute angle of a body segment is important. Explain your choices.

Which unit consists of a group of people and the place where they live

Why is metabolic activity most accurately expressed as a rate

Taphonomists study a. undersea life b. how bone assemblages come to be buried c. the classification of fossil species d. plate tectonics

What three elements are present in all carbohydrates