Steroid hormones bind to receptors in the nucleus to activate or deactivate genes.

a. true
b. false


Answer: a. true

Biology & Microbiology

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Assuming geological evidence is accurate, life on Earth may have originated ____ billion years ago

a. 14 b. 4.6 c. 3.5 d. 2.1 e. 1.2

Biology & Microbiology

Most of the plant body is composed of

a. dermal tissue. b. root tissue. c. ground tissue. d. vascular tissue. e. cork tissue.

Biology & Microbiology

In statistics, what is a sample?

A) the mean of a population to be studied B) a small subgroup of a population to be studied C) the correlation between the two different experimental factors D) a range of values with a high probability of containing the true mean

Biology & Microbiology

You conduct a Limulus amebocyte lysate (LAL) assay on a sample of fluid that should be sterile. The result is positive! What does this indicate?

A) Endotoxin is present. B) The fluid is not sterile. C) Gram-positive bacteria are growing D) in the sample. E) Gram-negative bacteria are growing.

Biology & Microbiology