When taken by pregnant women, ________ decreases the chance of neural tube defects in infants
A) folic acid
B) vitamin C
C) vitamin K
D) calcium
Answer: A
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What will be an ideal response?
Angiosperm tracheids move water more rapidly from roots to shoots than gymnosperm tracheids
Indicate whether the statement is true or false.
A pigment absorbs a photon only if the energy of the
photon is a. exactly enough to boost an electron of the pigment to a higher energy level. b. slightly more than the energy of the electron absorbing the photon. c. significantly more than the energy of the electron absorbing the photon. d. exactly twice the energy of the electron absorbing the photon. e. any of these, depending on the type of pigment.
Which antibody has the shape of a pentamer, or five-sided arrangement?
A) IgM B) IgA C) IgG D) IgD