Only ____ make direct contact with brain interneurons rather than afferent neurons
a. olfactory receptors
b. taste receptors
c. chemoreceptors
d. mechanoreceptors
e. photoreceptors
ANSWER: a
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Huntington's disease, an often fatal disease of the central nervous system, is inherited from a dominant allele. Furthermore, a person may not show symptoms of the disease until 30 – 50 years of age. Jack and Jill have been married for 40 years and have two children, Joe and Jane. Jack has recently been diagnosed with Huntington's disease. Assuming that Jane does not have the disease, determine
the probability that one of the children will eventually have Huntington's. What is the probability that both Joe and Jane will inherit the disease? Text section: LO2 Key Concept: dominant inheritance Level: Application of concepts What will be an ideal response?
Studies on aneuploidies of the sex chromosomes reveal that
A. the X chromosome is not necessary for survival. B. the Y chromosome is not necessary for survival. C. two copies of the X chromosome are necessary for survival. D. two copies of the Y chromosome are fatal. E. none of these is true.
When faced with multiple possible cladograms, the criteria of ____ is employed
a. cladology b. subtraction c. biodiversity d. parsimony
e. evolutionary deductionOnce a cell goes through mitosis, the daughter cells go through a finite time of growth and normal cellular functions. What phase of the cell cycle do these processes constitute?
A) interphase B) telophase C) metaphase D) prophase