Which types of hormones can enter cells and turn specific genes on and off?

a. steroid and peptide hormones
b. steroid and thyroid hormones
c. thyroid and peptide hormones
d. peptide and phospholipid hormones
e. steroid and phospholipid hormones


B

Biology & Microbiology

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Which structural feature is common in BOTH Planctomycetes and Verrucomicrobia but RARELY found in bacteria outside these two phyla?

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Cultures for isolation of Campylobacter jejuni and Campylobacter coli should be incubated in:

a. a capnophilic atmosphere at 42°C and examined at 24 and 48 hours. b. a microaerophilic atmosphere at 35°C and examined at 24 and 48 hours. c. regular room air at 35°C and examined at 48 and 72 hours. d. a microaerophilic atmosphere at 42°C and examined at 24 and 48 hours.

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A population of people who have lived in the middle of the jungle for thousands of years without

coming in contact with other individuals would show evidence of: a. genetic stasis. b. genetic equilibrium. c. random mating. d. an increase in non-harmful alleles. e. genetic polymorphism.

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What is a unique feature of some New World monkeys that Old World Monkeys do not have?

a. long limbs b. four footed c. prehensile tail d. opposable thumb e. nostrils directed downward

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