Which of the following tests would be useful in identifying escherichia coli? a. e. coli is a gram-negative bacillus that ferments lactose and glucose, but not sucrose. it is motile and does not utilize citrate or urea. b. e. coli is a gram-negative diplococcus that ferments lactose and glucose, but not sucrose. it is motile and breaks down citrate. it cannot produce urease. c. e. coli is a gram-negative bacillus that ferments glucose and sucrose, but not lactose. it is nonmotile and can produce urease, but it does not utilize citrate. d. e. coli is a gram-negative bacillus that ferments glucose and sucrose, but not lactose. it is motile and does not utilize citrate or urea. a

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate