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quester [9]
3 years ago
6

Which causes natural selection to occur?

Biology
1 answer:
Fiesta28 [93]3 years ago
4 0
A.
Lack of competition
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One g of fecal matter was suspended in 99 ml saline solution (tube 1). After mixing gently but thoroughly, one ml from tube 1 wa
malfutka [58]

Answer: the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

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We know that; Gram negative bacteria looks  pale reddish in color under a light microscope from Gram staining.

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1 mL of from tube 1 was removed and added to tube with 99 mL saline (tube 2) dilution is 1/100.

transferred volume  into the plate is 1 mL.

Now, we have to determine the cfu/g Gram-negative bacteria in the fecal sample

Formula to calculate CFU/g bacteria in fecal sample is expressed as;

C = n/(s×d )

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