Why does each successively higher feeding level in an energy pyramid have less biomass

Trace fossils are recognized as evidence of what pre-existing life

Three sources of genetic variation are

Which of the following is a bivalve? a. crab b. shrimp c. tuna d. oister e. spongbob

People with type o-negative blood are referred to as universal donors, although if you give type o-negative blood to any patient you run the risk of a transfusion reaction due to certain antibodies present in the blood.

Which of the following is not a primary function of dietary protein? A. Regulating metabolism and fluid balance B. Building new cells and tissues C. Repairing damaged structures D. Serving as a primary source of energy for the body

Which statement best explains how enzymes speed up chemical reactions? Question options: A. Enzymes lower the activation energy of a reaction. B. Enzymes gain heat from chemical reactions. C. Enzymes change shape during chemical reactions. D.

What is the most common sexually transmitted infection (sti) among young, sexually active people, particularly women?

Social networking is more important than direct contact with friends. A. True B. False

Simulated environment with equal amounts of insects seeds and fruit which flock will be able to eat the most the least and why

The English physician Ronald Ross wanted to try to find the cause of malaria. Based on his observations, Ross suggested that the Anopheles mosquito spread malaria from person to person. This suggestions was ... ?