External cell membranes function to

a. Create a surface for chemical reactions

b. Produce ATP

c. Join cells together

d. Protect the cells internal environment

Extinction of existing species: Group of answer choices a. Is an unconformity. Occurred at a low level throughout geologic history. b. Occurred only at times of catastrophic mass extinctions. c.

In which part of the ocean is mixing of water most vigorous? from 2 to 3 kilometers down from 1 to 2 kilometers down very deepest portions surface?

Nest building in weaver birds demonstrates how A. behaviors are influenced by inheritance and experience. B. behaviors are not related to inheritance or experience. C. behaviors are influenced strictly by inherted traits. D.

Which part of your brain receives information that you are moving your legs?

How do you think the nervous, epithelial, connective, and muscle tissues in your stomach work together in the process of digestion? (hint think about the functions of the four types of tissues.)

Which biomolecule is the most important

The genes a, b, and c are different genes that reside on the same chromosome. Genes a and b are 10 cM apart, b and c are 2 cM apart, and a and c are 8 cM apart.

Chapter 14 Lab: Using Human DNA to Identify Human Remains. What rule should they use to select a relative who's DNA could be used to try to confirm the identity?

How is a stimulus transmitted across a synapse?

Women with a higher body weight are more susceptible to bone fractures than those with a lean or lower body weight. question 18 options: a. True b. False