Choose the best answer

1			Actinomycetes are usually found in __________ habitats.
			A)	soil
			B)	freshwater
			C)	marine
			D)	all of these.
2			Actinomycetes form
			A)	substrate mycelia.
			B)	aerial mycelia.
			C)	both substrate mycelia and aerial mycelia.
3			Actinomycetes form spores that are
			A)	asexual
			B)	are used for sexual reproduction
			C)	both asexual and sexual
			D)	they do not form spores
4			The streptomycetes represent __________ of the viable organisms in the soil.
			A)	5%
			B)	10%
			C)	1-20%
			D)	1-10%
5			Diphtheria is caused by a member of which of the following genera?
			A)	Mycobacterium
			B)	Corynebacterium
			C)	Streptomyces