In the 1920s and 1930s, terrible dust storms carried away tons of good soil from farmland in western Oklahoma. Which of the following would be a result?

A) massive immigration B) shortening of the doubling rate
C) reduction in carrying capacity D) exponential growth of human population


Answer: C

Biology & Microbiology

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Low return of nutrients in the pelagic zone results in relatively low primary production in the open ocean when compared to freshwater lake systems

Indicate whether the statement is true or false.

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Trisomy 8 usually leads to early miscarriage of a fetus. However, adult individuals have been found with cells that have three copies of chromosome 8 in them. How can this be?

A. The trisomic 8 adults likely have a mosaic region with trisomy 8 B. The trisomic cells underwent complete nondisjunction. C. The trisomic cells underwent a meiotic nondisjunction. D. This individual must be triploid.

Biology & Microbiology

Lichens dominate in extreme environments

What will be an ideal response?

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Select the hormones that are produced by the adrenal medulla.

A) aldosterone and cortisol B) acetylcholine and norepinephrine C) luteinizing hormone and follicle-stimulating hormone D) antidiuretic hormone and oxytocin E) epinephrine and norepinephrine

Biology & Microbiology