Members of the phylum ____ all have at some point during development a hollow dorsal nerve cord, a

perforated pharynx, a notochord, and segmented muscles in both the body wall and postanal tail.



a. Hemichordata
b. Echinodermata
c. Cnidaria
d. Arthropoda
e. Chordata


E

Biology & Microbiology

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________ are microbial infections acquired by hospital patients with noninfectious diseases because they are compromised hosts

A) Healthcare-associated infections B) Immunocompromised infections C) Pathogenic infections D) Virulent infections

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Active transport pumps typically move solutes from areas of ____ concentration to areas of ____ concentration

a. high; low b. low; high c. neutral; high d. neutral; low e. low; neutral

Biology & Microbiology

Genetically distinct populations of squirrels on the northern and southern rims of the Grand Canyon can be considered an example of sympatric speciation

a. true b. false

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Which statement about conjugation is false?

a. Conjugation is a process of bacterial reproduction. b. E. coli is the model for bacterial conjugation. c. After conjugation, each cell involved has a copy of the shared DNA.

Biology & Microbiology