The two types of vascular tissue in most plants are:

a. Lignin and xylem
b. Xylem and phloem
c. Lignin and phloem
d. Xylem and stomata
e. Stomata and lignin


Answer: b. Xylem and phloem

Biology & Microbiology

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A gene that normally has the sequence CAGAGCCTATTAGGC is replicated as CAGAGCTGACGAGGC. Which of the following repair mechanisms would most likely be employed to fix this replication error?

A. base excision repair B. nucleotide excision repair C. base excision repair and/or nucleotide excision repair D. DNA polymerase proofreading E. None of the answer options is correct.

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A virus that infects a bacterium is called a/an ____________.

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

Biology & Microbiology

Which of the following are virulence factors contributing the pathogenicity of Neisseria species?

A) hemolysin B) fimbriae C) a capsule D) exotoxins E) both a capsule and fimbriae

Biology & Microbiology

An individual human can be thought of as a ________, consisting of a host and a variety of microbes. DNA from saliva or fecal samples, for example, would reveal the DNA genomes of both the host and its symbiotic microbes, known together as the ________.

A. holobiont, hologenome B. microbiome, hologenome C. microbiome, microgenome D. hologenome, holobiont

Biology & Microbiology