Match the following items to the correct phrase.
_______1. The bacteria that cause syphilis and Lyme disease are
_______2. are obligate intracellular pathogens that cause diseases such as
trachoma, inclusion conjunctivitis, and urethritis.
_______3. are photosynthetic.
_______4. have no cell walls.
_______5. are obligate intracellular pathogens that cause diseases such as
typhus and Rocky Mountain spotted fever.
a. chlamydias
b. cyanobacteria
c. mycoplasmas
d. rickettsias
e. spirochetes
1. E
2. A
3. B
4. C
5. D
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Chemicals used for disinfection that are capable of disrupting cellular membranes and reduce the surface tension through cationic disruption of water molecules are termed:
a. alcohols. b. bleach. c. iodine or heavy metal compounds. d. quaternary ammonium compounds.
Bacteroids are
a. specialized nitrifying bacteria. b. small buds from ammonifying bacteria. c. specialized bacteria that help some plant roots absorb phosphorus. d. enlarged and immobilized nitrogen-fixing bacteria. e. interactions between plant root hairs and bacteria.
Growth __________, but development __________
a. is qualitative; is quantitative b. is measured by increased cell numbers; is measured by increased cell specialization c. occurs only in infants; occurs only in adolescents d. continues throughout life; stops at puberty e. is objective; is subjective
Each gamete gets only one copy of an allele because it has ____
a. one copy of each chromosome b. one nucleus c. one chromosome d. a diploid number of chromosomes e. either an X or a Y