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Andrew [12]
2 years ago
10

What is homeostatis? a.how organ systems develop with organs that have related functions B.the process of cells specializing to

form tissues C.the way that the body is organized D.how the body keeps its internal environment stable
Biology
1 answer:
tatiyna2 years ago
7 0

Answer:

D. how the body keeps its internal environment stable

Explanation:

Homoestasis is any process that living things use to actively maintain fairly stable conditions necessary for survival.

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3 years ago
A bacterial sample has a cell density of 1.85 x106 CFU/mL. What plate dilution should yield a countable plate? Which two dilutio
insens350 [35]

Answer:

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Bacterial count in stock- 1.85x10^6 cfu/ml

Dilution methods

Take 100 uL or (0.1ml) from stock and add to 900ul (0.9ml) saline and mixed it- this makes 10^1dilution.

Now take 100ul from 10^1 dilution and add to next 900ul saline this is 10^2 dilution, similarly do upto 10^5 dilution.

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Cfu/ml formula= (No.of colonies x dilution factor)/0.1 ml

So suppose, 18 colonies formed on 10^4 dilution then total no. Of cells in stock will be 18x10^4/ 0.1= 18x10^5 cfu/ml.

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