Choose all the answers that apply.

Food chains:

1, begin with producers

2, end with decomposers

3, show the flow of energy in an ecosystem

4. represent the ratio of producers to consumers

5. show predator-prey relationships

Which is a limitation of using only morphology to recognize species?

In the case of cancer, uncontrolled cell division is a problem because it A. causes excessive white cell production. B. interferes with other cell replication. C. lowers t-cell and lymphocyte production. D. requires unreasonable hydration rates.

What conditions must be true for a population to remain in genetic equilibrium? a) gene flow, genetic drift, sexual selection, population isolation, and no mutations b) gene flow, random mating, no mutations, no genetic variation, and no natural

What is the state of the heart during systole? a. filling with blood b. suffering an attack c. contracting d. at rest?

Heart disease is a noncommunicable disease because it can be spread. it can be influenced by lifestyle factors. it is contagious. it only affects individuals, not communities.

Researchers are studying the way plants move in response to stimuli. Which scenario could be used to test phototropism? A) Two sets of plants could be placed in a dark room and the growth monitored.

Parkinson's disease and Huntington's disease are both extrapyramidal motor disorders. Describe what we know about each disorder (i. e., symptoms, causes, treatment). Explain how they are similar and how they are different.

Which of the following does eccentricity describe

Describe the function of a chemical synapse.

What are the types of friction