The courtship display of the wandering albatross is primarily a(n) ____display
a. acoustical
b. visual
c. chemical
d. electrical
e. tactile
ANSWER: b
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Chemolithotrophs near hydrothermal vents support a variety of life forms. Why is this analogous to photosynthetic microbes supporting life forms closer to the surface of the planet?
A. Because all life forms need some energy source, electron source, and carbon source. Chemolithotrophs fix inorganic carbon and, if consumed by other microbes, could serve as sources for all three requirements for life. This is very similar to the role that photosynthetic microbes play in the top levels of the oceans/lakes. B. Because chemolithotrophs will also utilize energy from sunlight to form their sugars/get their chemical energy...much like photosynthetic microbes. C. Because chemolithotrophs also pull in carbon dioxide as their carbon source, just like photosynthetic microbes. D. Because photosynthetic microbes utilize heat energy from the sun as an energy source. Chemolithotrophs utilize heat energy from hydrothermal vents, but it's still heat energy. This makes both microbes similar.
The plant hormone ____ governs senescence in plants, such as the loss of leaves in autumn by some plants
a. cytokinins b. abscisic acid c. gibberellins d. brassinosteroids e. ethylene
Which of the following represents the product of beta-oxidation?
a. amino groups b. acetaldehyde groups c. acetyl groups d. fatty acid chains
The smallest functional unit of the sensorimotor system, consisting of a single alpha motor neuron and all of the muscle fibers it innervates.
a. Motor neuron b. Motor unit c. Motor neuron pool d. Action potential