Partial or complete loss of hearing (deafness) can be caused by damage to the _____
I) axons of the neurons associated with each hair cell that carry information to the brain II) hair cells (the sensory receptors) in the cochlea III) tympanic membrane, or eardrum A) only II
B) only III
C) only I and II
D) I, II, and III
D
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Bacterial plasmids
A. are essential for growth. B. can provide genes that allow the bacteria to grow and thrive in the presence of potential toxins. C. are essential for cellular respiration. D. are artificially created by humans and are present in bacteria only because humans put them there. E. are essential for chromosome replication and binary fission.
How do kelp beds in the northeastern U.S. differ from those of the northwestern U.S.? What is the dominant non-human predator in each habitat?
What will be an ideal response?
What are attributes of oral contraceptives? (Check all that apply.)
_____ They contain a progesterone and sometimes an estrogen analogue. _____ The progesterone is in the 21-day pills, and the estrogen is in the 7-day pills. _____ They help protect against ovarian and endometrial cancer. _____ They are appropriate for use by smokers over age 35. _____ They have a low failure rate of only 1 to 5% a year. _____ They act by inhibiting LH and FSH secretion, inhibiting ovulation.
In a search for new antibiotics, a previously unknown organism has been recovered from the soil. It is nonmotile and is composed of long threadlike structures formed from nucleated cells. It is not-photosynthetic and absorbs its nutrients. This organism will most likely be classified among the
A. Eukaryotes (Fungi) B. Archaea C. Eukaryotes (Algae) D. Eukaryotes (Protozoa) E. Bacteria