Which of the following statements about the lateral line system is not correct?
A. Allows a blind cave fish to sense the water patterns flowing past its body
B. Allows fish to sense objects based on the pressure waves they produce
C. Allows fish to swim in synchrony with a school of other members of its species
D. Allows fish to sense objects based on the low-frequency vibrations they produce
E. Provides the fish with the ability to see images
Answer: E
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Infections by Helicobacter pylori cause 90% of peptic ulcers in the United States. These bacteria have pili that are only expressed in acidic conditions. A characteristic of this organism should be an ability to
A. avoid ingestion by cells in the immune system. B. enter the bloodstream. C. attach to cells in the host organism's stomach. D. induce a large antibody response. E. move in the direction opposite the pili.
In a dihybrid cross, you want to calculate the probability that an F2 progeny of the cross will inherit both dominant phenotypes. Which of the rules of probability can be used to calculate the probability of obtaining that combination of alleles?
What will be an ideal response?
Some regions of chromosomes remain highly condensed, tightly coiled, and untranscribed throughout the cell cycle. These regions are referred to as
A. noncoding DNA. B. single sequence repeats. C. constitutive heterchromatin. D. short interspersed elements. E. transposable elements.
The autonomic nervous system
A) integrates sensory inputs to the brain. B) carries signals to and from skeletal muscles. C) regulates the internal environment of the body. D) is part of the central nervous system.