Escherichia coli is a chemoorganotrophic, facultative aerobe and belongs to the Proteobacteria phylum. Based on this information, which of the following functional groups does E. coli most likely belong to?
A) green sulfur bacteria
B) ammonia-oxidizing bacteria
C) denitrifying bacteria
D) nitrite-oxidizing bacteria
Answer: C
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How does gene flow affect the genetic composition in populations?
A. Gene flow promotes genetic diversity by introducing new alleles into populations. B. Gene flow tends to make the allele frequencies in neighboring populations more similar to each other. C. Gene flow promotes genetic diversity by introducing new alleles into populations and gene flow tends to make the allele frequencies in neighboring populations more similar to each other. D. Gene flow promotes genetic similarities by removing alleles from a population.
____ allow bacteria to join together to transfer genes
a. Flagella b. Spores c. Capsules d. Pili e. Cilia
Osteoclasts function in bone remodeling to
a. free mineral ions. b. stimulate blood cell formation. c. accelerate bone repair. d. lay down a bony matrix. e. do all of these.
Earth's axis is tilted away from the sun during ________ and toward the sun during ________ in the Northern Hemisphere
A) winter; summer B) summer; winter C) spring; fall D) fall; spring