The mechanisms that reoviruses have evolved to evade the host immune system include ALL of the following EXCEPT
a. capping and methylation of virus mRNAs by viral enzymes.
b. genome replication within the nucleocapsid.
c. the use of host nucleotides for RNA synthesis.
d. denaturing of proteolytic enzymes in host lysosomes.
Answer: D
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True or false: A species' niche is determined only by its physical environment
A. true B. false
The factor most likely to exert a NEGATIVE feedback on the secretion of ADH is ______.
A. high blood pressure B. low blood volume C. low blood osmolarity D. Two of the above
In general, microbial growth in the open ocean is most limited by the availability of ________.
A. iron B. manganese C. phosphorus D. nitrogen
A keystone species is the most numerous species in an ecosystem
Indicate whether the statement is true or false