Pollen is to sperm as _____ is to _____.
Fill in the blank(s) with the appropriate word(s).
Answer: female gametophyte; egg
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Effector B cells secrete antibodies that are ____ those produced by the original B cell from which they arose, which
then ____.
a. identical to; flag antigens for phagocytosis and prevent them from attaching to body cells b. different than; help antigens attach to body cells c. identical; prevent antigens from clumping together to d. different than; present them on the surface of dendritic cells e. in addition to; flag antigens for elimination by urination
Sue has begun to lactate, but she has not recently given birth. Which of the following might be causing this abnormality?
A) excess estrogen B) progesterone production C) hyperthyroidism D) pituitary tumor
Binding of the activating nucleotide di- or triphosphate causes the Ras protein to (first)
a. separate into subunits. b. split the terminal phosphate from the nucleotide-phosphate. c. undergo a conformational change. d. attach a farnesyl tail.
If alcohol is taken on a full stomach, the rate at which the BAC increases is (slower/higher) than when alcohol is taken on an empty stomach.
What will be an ideal response?