Clonal selection identifies a __ lymphocyte that needs to be cloned for production of a specific antibody. 1. T 2. B 3. Both 4. Neither

The thin, leaf-shaped structure that covers the entrance of the larynx when the individual swallows is the.

Why is it unlikely that identical twins would have identical fingerprints

What determines the texture of soil? O A. The amount of air and water in it O B. The amount of organic humus present O C. The amount of dark - versus light-colored rock O D. The relative amounts of sand, silt, and clay

Why do we say that "an enzyme is reusable"? A) The enzyme does not actively take part in the reaction. It just indicates that the reaction is complete.

A scientific hypothesis can become a theory if A. the entire scientific community accepts it. B. the hypothesis is tested extensively and competing hypotheses are eliminated. C. there are no other competing hypotheses. D.

In what part of the cell does glycolysis take place

Geological evidence indicates that two landmasses, separated by a deep ocean channel, have been moving apart since 45 million years ago. You are studying a group of organisms that has widespread populations on both of the landmasses.

These are organisms produced with externally introduced genes

Which of the following statements about the field of health psychology is most accurate? a. It does not define health as being the mere absence of disease. b. It focuses exclusively on positive psychology. c.

Science Which factor is the main difference between a cell nucleus and a nucleiod? A. size of the organelle B. arrangement of the cytoskeleton C. movement of the flagella D. presence or absence of a surrounding membrane