Water molecules are attracted to one another by _____

A) nonpolar covalent bonds
B) ionic bonds
C) hydrogen bonds
D) hydrophobic interactions


C

Biology & Microbiology

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The most dangerous outcome of a Taenia solium infection occurs when

A. larvae cross the placenta. B. eggs are ingested. C. larvae enter the body through intact skin. D. cysticerci are ingested. E. the host immune system fails to react against it.

Biology & Microbiology

What structure may have acted as a boundary for a cell-like environment before protocells formed?

a. acidic water from volcanic springs b. chambers in rocks c. metal ions from rocks d. clay e. lipid membrane

Biology & Microbiology

A patient is complaining of erectile dysfunction. Based on what you know about the physiology of erections, what likely cause will you look for in your workup? 

A. Excessive caffeine consumption B. Atherosclerosis C. Damage to the baculum D. Damage to the vas deferens

Biology & Microbiology

DNA is a double-stranded molecule and RNA is a single-stranded molecule.

a. true b. false

Biology & Microbiology