Damage to the substantia nigra, a specific region of the basal ganglia, can produce the resting muscle tremors characteristic of what disease?
A. epilepsy
B. Parkinson disease
C. seizures
D. Alzheimer disease
E. insomnia
B. Parkinson disease
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Motion sickness is the result of
a. overstimulation of the hair cells in the vestibular apparatus. b. visual input that tells the brain that the body is motionless. c. cell phone use in a moving vehicle. d. overstimulation of the hair cells in the vestibular apparatus and visual input that tells the brain that the body is motionless. e. overstimulation of the hair cells in the vestibular apparatus, visual input that tells the brain that the body is motionless, and cell phone use in a moving vehicle.
Amoebozoans move by means of flagella
_______________ Indicate whether the statement is true or false.
Mycobacterium leprae infects (epithelial/macrophage/skin) cells.
Fill in the blank(s) with the appropriate word(s).
In Lake Malawi cichlid fishes, one can observe two color variants, Black Barred (BB) and Orange Blotch (OB)
Sex in these fishes are not determined by a sex chromosome, but rather by a gene on an autosome which produces either males or females. Both of these phenotypes are controlled by one biallelic locus each. OB females have a selective advantage in terms of their survivability: The OB phenotype allows females to blend into their background. OB males have a selective disadvantage because their reproductive coloration is dis-rupted and they have little mating success. How would this process influence the as-sociation of alleles at the color locus and sex determining locus? What will be an ideal response?