If the protective coverings of the brain were damaged, the ____ would be damaged
a. ventricles
b. thalamus
c. medulla
d. meninges
e. reflexes
ANSWER: d
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Annelids possess all of the following except
A. muscles to swim, crawl, and burrow. B. ganglia to respond to light and respond to other environmental cues. C. circulatory, excretory, and neural elements in each segment. D. setae in each segment. E. adductor muscles.
Roses are red because of which pigment?
a. anthocyanin b. chlorophyll b c. beta-carotene d. phycoerythrobilin e. chlorophyll a
Sigma (?) factors can regulate the initiation of transcription. Which of the following is not an example of ? regulation?
A) Some ? factors recognize promoters for genes whose products are necessary when the organism is under stress, such as heat shock. B) Some ? factors recognize promoters for genes whose products are necessary for nitrogen utilization. C) Bacteriophages may code for specific ? factors that bind the core RNA polymerase and result in recognition of viral promoters. D) Many ? factors regulate genes associated with embryonic development in eukaryotes. E) UV irradiation can trigger the use of alternative ? factors.
Cystic Firbrosis is a homozygous recessive condition. A genetic counselor should advise concerned parents that, if each of them has a parent who has cystic fibrosis yet neither of the concerned parents is affected, the probability of their potential child having cystic fibrosis is
a) 0% b) 25 % c) 50% d) 100%