The membranes that protect the brain and spinal cord are called

a) gray matter.
b) cerebrospinal membranes.
c) epithelium.
d) meninges.
e) ventricles.


Ans: d) meninges.

Biology & Microbiology

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Jeremy leads an active lifestyle. He spends at least two hours in the gym every day. He follows a high protein diet and consumes caffeine in moderate quantities. Despite this, Jeremy falls asleep at his desk four to five times a day. Once he wakes up, he finds it difficult to move around for a few minutes. He likely has

A) anorexia nervosa. B) bulimia. C) schizophrenia. D) narcolepsy.

Biology & Microbiology

The key difference between incomplete dominance and codominance is

a. with incomplete dominance, the recessive allele cannot be detected; in codominance, the expression of the recessive allele is apparent. b. with incomplete dominance it is possible to detect the expression of a recessive allele; in codominance, both alleles contribute equally to the phenotype. c. with codominance it is possible to detect the expression of a recessive allele; in incomplete dominance, both alleles contribute equally to the phenotype. d. with incomplete dominance, it is possible to detect the expression of the dominant allele; in codominance, both alleles contribute equally to the phenotype. e. the two terms mean the same thing.

Biology & Microbiology

The accompanying figure is the product of a:

a. phase-contrast light microscope.
b. Nomarski differential interference microscope.
c. transmission electron microscope.
d. scanning electron microscope.
e. confocal fluorescence microscope.

Biology & Microbiology

Cytotoxic T-cells attack:

a) Host cells infected with bacteria b) Transplanted tissue cells from another host c) Cancer cells d) Two of the above are true e) All of the above are true

Biology & Microbiology