Which maternal serum marker pattern indicates increased risk of Down syndrome in a fetus?
A) Deficient hCG and inhibin A and elevated AFP, estradiol, and pregnancy-associated plasma protein A Progesterone and testosterone
B) Elevated hCG, inhibin A, AFP, estradiol, and pregnancy-associated plasma protein
C) Deficient hCG, inhibin A, AFP, estradiol, and pregnancy-associated plasma protein
D) Elevated hCG and inhibin A and deficient AFP, estradiol, and pregnancy-associated plasma protein A
D) Elevated hCG and inhibin A and deficient AFP, estradiol, and pregnancy-associated plasma protein A
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Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This ratio suggests that _____
A) the parents were true-breeding for contrasting traits B) the particular trait shows incomplete dominance C) a blending of traits has occurred D) the parents were both heterozygous for the particular trait E) each offspring has the same alleles for each of two different traits
In the mechanism of stomatal opening, after light activates proton pumps which of the following
happens next? a. Guard cells change shape. b. Hydrogen ions are actively transported out of guard cells. c. Potassium ions diffuse into guard cells. d. Chloride ions diffuse out of guard cells. e. Water moves by osmosis into guard cells.
What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?
A) ionic bond B) covalent bond C) hydrogen bond
Fats that contain only SINGLE bonds are called, __________ _________ (solid at room temp.)
Fill in the blank(s) with the appropriate word(s).