If the number of people who become ill during an epidemic rises and falls rapidly, this is called a(n)
A. propagated epidemic.
B. promulgated epidemic.
C. common source epidemic.
D. index epidemic.
C
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Transcriptionally active genes are characterized by:
A. an increase in H1. B. the presence of bound nucleosomes at the promoter regions. C. the presence of specialized chromosome remodeling complexes. D. the absence of histone variants such as H2AZ and H3.3. E. All of these choices are correct.
What is the result when airborne sulfur and nitrogen oxides coat dust particles?
a. wet acid deposition b. dry acid deposition c. a chemical reaction that produces sulfuric and nitric acids d. wet acid deposition and increased soil pH when dust settles e. dry acid deposition and reduced soil pH when dust settles
In the horses example above, if a homozygous black trotter is crossed to a chestnut pacer,
(a) what will be the appearance of the F1 and F2 generations? (b) which phenotype will be the most common? (c) which genotype will be the most common? (d) which of the potential offspring will be certain to breed true? What will be an ideal response?
What plant group includes almost all modern crop plants?
A) gymnosperms B) annual plants C) dicots D) legumes