Which of the following events would most unpredictably affect an ecosystem?

A. the removal of one old tree

B. a mutation in a native bacteria

C. the annual birth of a new generation of deer

D. a rainstorm that causes minor flooding.

Cellular respiration uses one molecules of glucose to produce approximately ___ molecules of ATP. A. 36 B. 2 C. 4 D. 24 E. 12

Stomach acids kill most of the cholera bacteria that are ingested but some survive. How is this possible? a. There is enough acid to kill all of the bacteria. b. Food in the stomach can neutralize the stomach acid so the bacteria don't die. C.

The bones in the front fins of whales and the bones in the human arm evolved from a common ancestor but carry out different functions. This is an example of A. embryonic structures. B. analogous structures C. homologous structures. D.

The relationship that results when organisms in an environment rely on each other for resources A. coevolution B. interdependence

Atp is an important energy transfer molecule because

A pregnant woman at 37 weeks gestation calls the clinic to say she thinks that she is in labor. the nurse instructs the woman to go to the health care facility based on the client's report of contractions that are:

A human nose is capable of detecting how many basic odors? a. 20 b. 40 c. 49 d. 50

Why is a control necessary to have when designing an experiment?

Why are there many separate ecosystems in a rainforest

Describe several ways in which the cheek epithelial cells differed from the potato, tomato, and onion cells? be specific