Scientists consider prions to be "puzzling" proteins. Which of the following is TRUE about prions?
A) Prions are noninfectious proteins.
B) Prions are proteins that are denatured more easily than most proteins.
C) Prions are infectious proteins that cannot be denatured by any amount of heat.
D) Prions are proteins that cause nearby proteins to change shape and become infectious.
D
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Which organism has hemoglobin located in the fluid portion of the blood, giving it a red appearance?
A. grasshopper B. bird C. flatworm D. human E. earthworm
Identifying carboxysomes in a bacterium suggests it
A) contains the reverse citric acid cycle. B) has a deficient Calvin cycle and accumulated CO2. C) is in a carboxylic acid rich environment and is storing excess quantities for potentially harsh conditions. D) will use the Calvin cycle convert the concentrated CO2 into biomass.
Compare the invertebrate nervous system to that of vertebrates
What will be an ideal response?
Which of the following is a difference between frogs and salamanders?
a. frogs have cloacas; salamanders do not b. salamander larvae are tetrapods; frog larvae are not c. salamanders have scales; frogs do not d. frogs reproduce in water; salamanders only sometimes reproduce in water e. more than one of these is a difference between frogs and salamanders