Isoniazid is a narrow-spectrum antibiotic that ________.
A. is one of the few drugs effective against Mycobacterium tuberculosis
B. is not useful as a chemotherapeutic agent
C. is one of the few drugs effective against systemic fungal infections
D. None of the choices are correct.
Answer: A
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Differentially methylated domains (DMDs) are associated with which of the following?
A. X-inactivation B. Genomic imprinting C. Maternal inheritance D. Extranuclear inheritance E. All of the answers are correct
When a cell divides, each daughter cell receives
A) the same amount of genetic information that was in the parent cell, but it has been altered. B) a nearly perfect copy of the parent cell's genetic information. C) exactly half the genetic information in the parent cell. D) twice the amount of genetic information of the parent cell.
Which observation(s) of the medium ground finch (Geospiza fortis) by Peter and Rosemary Grant verify Darwin's selection hypothesis? Check all that apply.
A. Offspring were similar to parents in beak size and shape. B. Considerable variation existed in the beak size and shape of this finch. C. Beak shape (depth) varied with the dryness of the year. D. The medium ground finch showed assortative mating according to beak size and shape.
What part of a neuron carries signals toward the part of the cell that houses the nucleus?
A) node of Ranvier B) axon C) cell body D) dendrite