Fucoxanthin is the pigment responsible for the color of
a. brown algae.
b. golden algae.
c. red algae.
d. red algae and golden algae.
e. brown algae and golden algae.
E
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How do mitogen-activated protein kinases become inactive?
A. Ras hydrolyzes GTP to GDP. B. Ligand diffuses away from the ligandbinding site. C. Phosphatases remove phosphate groups. D. Receptor kinases move apart in the membrane.
The chorion of amniotic eggs functions in:
a. supply of food. b. removal of wastes. c. gas exchange. d. protection of the egg. e. absorbing toxins.
In a lichen, the photobiont usually receives
a. nutrients. b. protection from herbivory. c. aid in sexual reproduction. d. enhanced dispersal of offspring. e. shelter from radiation and desiccation.
Which organ in the human body has the largest surface area?
A. Heart B. Skin C. Lungs D. Liver E. Stomach