Which one of the following best describes the electron transport chain?
a. Electrons pass from one carrier to another, releasing a little energy at each step.
b. Electrons are pumped across a membrane by active transport.
c. Acetyl-CoA is fully oxidized to CO2.
d. Glucose is broken down to a three-carbon compound in preparation for the Citric Acid cycle.
e. Hydrogens are added to CO2 to make an energy-rich compound.
Answer: a. Electrons pass from one carrier to another, releasing a little energy at each step.
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List some structures that distinguish bivalves from the other molluscan classes.
What will be an ideal response?
Organisms capable of producing their own food are known as
a. autotrophs. b. heterotrophs. c. omnivores. d. Herbivores.
In an earthworm's _________, fluid-filled internal chambers receive coordinated forces of circular and longitudinal muscle contraction to effect movement.
A. Appendicular skeleton B. Endoskeleton C. Axial skeleton D. Hydrostatic skeleton E. Exoskeleton
Sam was in a terrible head-on collision. When he recovered from all of the obvious, external injuries, the once affable and happy-go-lucky person had become surly and very unfriendly. Which part of his cerebrum was most likely damaged?
A) Broca's area B) prefrontal cortex C) thalamus D) postcentral gyrus