Which of the following exist as RNA surrounded by a protein coat?
A. Retrovirus
B. prion
C. Prokaryote
D. Spirochete
E. streptococcus
Ans: A. Retrovirus
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You examine the chromosomes from a somatic cell nucleus of a human individual. That nucleus contains a Y chromosome and a Barr body. Which of the following is ACCURATE?
A. The individual is a female because there is a Barr body. B. The individual is a male because there is a Y chromosome. C. The individual has Klinefelter Syndrome. D. The individual is a male with Klinefelter Syndrome. E. The individual is a female with Klinefelter Syndrome.
Thomas Bell and his colleagues studied bacterial species richness in isolated European beech treehole basins
("islands"). Their data showed that ______.
a. island size affects beech tree populations b. the number of bacterial species decreases with treehole volume c. the number of bacterial species increases with treehole volume d. large beech trees support higher bacteria populations than small beech trees e. the species-area effects on bacterial species differs from species-area effects on animal and plant populations on true islands
The major obstacle to the use of xenotransplants is ________________
A. not enough human donors B. finding the right sized animals C. resistance from opponents of genetically modified animals D. organ rejection by recipients E. more than one of these
How are hormones distributed to tissues, and what determines which cells a hormone will affect?
What will be an ideal response?