The greatest population growth rate occurs in the 

A. exponential growth phase.
B. lag phase.
C. stable equilibrium phase.
D. growth curve.


A. exponential growth phase.

Biology & Microbiology

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Virions attach to a target host cell by means of (capsules/fimbriae/ligands).

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

In reverse genetics, what is the correct order in which the experimenter proceeds?

A) silencing the genes in question using RNAi, followed by generating gain-of-function alleles B) screening genes via PCR, followed by deletion of the flanking sequences C) selection of a phenotypic alternative for the gene in question and sequencing its DNA D) induction of and selection for a mutant allele with a known sequence, followed by screening for mutations of interest E) random bombardment of the DNA with a known mutagen, followed by observation of offspring for newly acquired traits

Biology & Microbiology

Given the diagram below, assume that a G1 chromosome (left) underwent one round of replication in 3H-thymidine and the metaphase chromosome (right) had both chromatids labeled

Which of the following replicative models (conservative, dispersive, semiconservative) could be eliminated by this observation?

Biology & Microbiology

Which type of plant hormone promotes fruit ripening?

a. ethylene b. jasmonates c. gibberellins d. brassinosteroids e. abscisic acid

Biology & Microbiology