The opening of the larynx is called the
A) Glottis
B) Epiglottis
C) Vocal cords
D) Pharynx
Answer: A) Glottis
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The endosymbiotic theory says that precursor eukaryotic cells acquired cilia by endosymbiosis with a(n) ________ ancestor and others gained photosynthetic ability from endosymbiosis with a(n) ________ ancestor.
A. helminth, algal B. spiral, cyanobacterial C. protozoan, algal D. archaeal, cyanobacterial
Why does NADH produce more energy than FADH2?
a. FADH2 donates electrons to protein complex III as opposed to complex II. b. FADH2 requires more ATP to produce it and gives more energy back. c. NADH and FADH2 are synthesized in different steps of cellular respiration. d. NADH donates electrons to a higher energy acceptor in the electron transfer chain. e. NADH supplies fewer electrons that are of a higher energy state than FADH2.
If a woman has reached or passed her due date (the date that a woman is expected to give birth), her obstetrician may use hormones to help initiate labor. Which of the following hormones would assist the most in the initiation of labor?
A) HCG B) FSH C) progesterone D) oxytocin
Which of the following is found in both archaeal and eukaryotic genomes?
A) chromatin fibers B) histones C) heterochromatin D) euchromatin E) nuclear envelope