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
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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
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
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
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.