Which of the following processes is/ are involved in the biogeochemical cycling of elements? I. biological, II. physical III. chemical
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____ is not a type of capsid symmetry.
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The following are features of gramme positive bacteria except ____.
A. they stain yellow
B. they stain red
C. they stain pink
D. they stain purple
Answer: D
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The following are types of mutagenic chemical except ____.
A. DNA modifying agents
B. pyrimidine bases
C. intercalating agents
D. base analogs
Answer: B
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The following are features of biogeochemical cycles except _____.
A. the elements go in cycle and are always free in organic state
B. the cycles are complex and involve the activities of producers, consumers and decomposers
C. the cycles are complex and involve the activities of producers, consumers and decomposers
D. the turnover rate of the element is not rapid in the atmosphere
Answer: D
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Which of the following statements best describes systematics?
A. the process of determining if a particular isolate belong to a recognized taxon
B. the scientific study of organisms with the ultimate objective of arranging them in an orderly manner
C. a branch of taxonomy concerned with the assignment of names to taxonomic groups
D. the organization of organisms into progressively more inclusive group
Answer: B
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Bacteria are divided into _____ volumes based on Bergey manual of systematic bacteriology.
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____ is not a microbial taxonomic rank.
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The following are characteristics of mycobacterium except _____.
A. they are either anaerobes or preferentially anaerobic
B. they are either saprophytes or pathogens
C. they are slightly straight or curved rods
D. they are acid fast
Answer: A
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____ are aerobes or facultative anaerobes that form irregular clusters by dividing into two or more planes.
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