Why is a pyramid or triangle often used to represent energy distribution in an ecosystem?

The process of cell division in which the chromosomes line up and divide into two separate nuclei is called

What happens to cellular respiration when there is no oxygen?

Epithelial tissues perform all of the following functions excepts

Which factor should be included in a model of energy flow into the atmosphere? A) Concentrations of greenhouse gases B) Number of flood days per year C) Places experiencing drought D) Variations in local temperatures

A hospital client has been reluctant to accept morphine sulfate despite visible signs of pain. upon questioning, the client reveals that he is afraid of becoming addicted to the drug.

A college student comes to the campus health care center complaining of headache, malaise, and a sore throat that has worsened over the past 10 days. the nurse measures a temperature of 102.6° f (39.2° c.

Which of the following provides the best summary of the process of natural selection? A. Individuals always change in response to their environment. B. Genes are passed from parent to offspring. c. Mutations always increase an individual's fitness.

The major product of photosynthesis that is exported from the leaves to the rest of the plant is

What are potential hypotheses (explanations) regarding why there are ecological equivalents between many metatherians and eutherians?

Which of the following is a form of stored (potential) energy? A.) light (radiant), B.) chemical, C.) movement (mechanical), D.) electrical, or E.) heat