In Drosophila, sex is determined by a balance between the number of haploid sets of autosomes and the number of ________
A) X chromosomes
B) telomeres
C) nucleolar organizers
D) Y chromosomes
E) centromeres
Answer: A
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________ not only stimulates the release of aldosterone from the adrenal glands but also causes constriction of small blood vessels (vasoconstriction)
Fill in the blank(s) with correct word
Root structures that grow around and encapsulate mutualistic nitrogen-fixing bacteria are called ____.
A. hyphae B. mycorrhizae C. Casparian strip D. root hairs E. root nodules
Which of the following antimicrobials does not match its potential shortcomings?
A) Macrolides: This narrow-spectrum drug must be administered parenterally. B) Phenicols: Has a narrow therapeutic index and is associated with bone marrow toxicity that results in aplastic anemia. C) Tetracyclines: Induce photosensitivity, causes detrimental effects on bones and teeth in children younger than 8 years old, and are associated with an increased risk of Clostridium difficile infection D) Aminoglycosides: Are known to cause irreversible hearing loss when administered other than topically. E) Lincosoamides: One common lincosoamide is associated with pseudomembranous colitis caused by Clostridium difficile.
Which statement does not describe helminthic parasites?
A) All tend to have complex life cycles that can involve different host species. B) All belong to one of two groups: roundworms or flatworms. C) An important mode of transmission is ingestion of the eggs or organism from feces-contaminated food and water. D) All are hermaphroditic. E) All reproduce sexually.