Choose the best answer

1			Once they evolved, _____________ forever changed the atmosphere on earth. Need a Hint?
			A)	bacteria
			B)	archaebacteria
			C)	cyanobacteria
			D)	eukaryotes
2			Which of the following statements is not true of prokaryotic cells? Need a Hint?
			A)	Prokaryotic cells are multicellular.
			B)	Prokaryotic cells do not have a nucleus.
			C)	Prokaryotic cells have circular DNA.
			D)	Prokaryotic cells have flagella.
3			When bacterial cell walls are covered with an outer membrane of lipopolysaccharide, they are Need a Hint?
			A)	gram-positive.
			B)	gram-negative.
			C)	encapsulated.
			D)	endospores.
4			The prokaryotic genome is contained in the Need a Hint?
			A)	plasmid.
			B)	endospore.
			C)	pilus.
			D)	nucleoid region.
5			Archaebacteria and bacteria differ in all of the following ways except Need a Hint?
			A)	the structure of the cell wall.
			B)	their presence in nonextreme environments.
			C)	the structure of the plasma membrane.
			D)	the kinds of ribosomal proteins they possess.
6			Genetic recombination has led to antibiotic resistance through the transfer of Need a Hint?
			A)	pili.
			B)	endospores.
			C)	plasmids.
			D)	bacterial chromosomes.
7			Prokaryotic organisms that obtain their energy by oxidizing inorganic substances are called Need a Hint?
			A)	chemoautotrophs.
			B)	photoautotrophs.
			C)	chemoheterotrophs.
			D)	photoheterotrophs.
8			What disease is experiencing new outbreaks because of antibiotic resistance? Need a Hint?
			A)	smallpox
			B)	cholera
			C)	tuberculosis
			D)	diphtheria
9			The disease sometimes referred to as the "silent STD" because it is usually asymptomatic in women early on is Need a Hint?
			A)	chlamydia.
			B)	gonorrhea.
			C)	syphilis.
			D)	pelvic inflammatory disease.
10			Which of the following can be attributed to bacteria? Need a Hint?
			A)	decomposition of dead organic matter
			B)	increasing oxygen levels in the atmosphere
			C)	production of antibiotics
			D)	all of these