List the order of events that will occur during a reflex arc.
What will be an ideal response?
1. A sensation causes the sensory receptors in the skin to generate nerve signals that move along sensory fibers toward the spinal cord.
2. Sensory neurons pass signals on to many interneurons.
3. Some of the interneurons integrate the information and then relay signals to motor neurons.
4. Nerve signals travel along these motor fibers to an effector, which brings about a response to the stimulus.
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What is the basic structure of most lipids?
A) A glycerol head and up to three fatty acid tails B) A linear chain of individual monomers C) A branched chain of individual monomers D) A chain of fatty acid tails
Individuals can inherit a defective APC gene on chromosome 5 from one parent that makes them susceptible to developing familial adenomatous polyposis. In which cells is this deletion present in affected individuals?
A) somatic cells B) germ cell precursors C) colon polyp cells D) colon epithelial cells E) all cells
Four of the following explain the area effect on island diversity. Which one is the exception?
A. Larger islands have more habitats. B. Smaller islands have more varied and higher elevations. C. Larger islands intercept more colonizers. D. Smaller islands have less complex topography. E. Smaller islands have a greater probability of a species becoming extinct.
Which of the following bacteria oxidize nitrite (NO2-) to produce nitrate (NO3-)?
A) Nitrobacter B) Azospirillum C) Nocardia D) Cyanobacter E) Rhizobium