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elixir [45]
3 years ago
11

Which statement among A-D is false regarding the standard plate count method?

Biology
1 answer:
scoundrel [369]3 years ago
3 0

Answer:

The correct answer is option E. "None of A-D is false; all are true statements".

Explanation:

The standard plate count involve different considerations including the ones listed:

A. It utilizes a standard dilution procedure called serial dilution. Most of the time culture plates have thousands of cells growing in it, it is necessary to use a standard dilution in order to make the counting feasible.

B. It measures both live and dead cells in the liquid sample. The standard plate count procedure uses a dye such as crystal violet to differentiate among live and dead cells. Both should be counted and the percentage of viability should be reported as well.

C. A countable plate in the procedure is one having 30 to 300 CFUs on it. Between 30 to 300 CFU is considered a countable plate since less than 30 will be make errors in dilution to be considerable and more than 300 is difficult to count and tend to form cell aggregates.

D. It is a viable count method to quantitate cell density of a liquid sample. This is true as long as the cells in the liquid sample are able to growth in a standard plate as well, since the cells must adhere to the counting device in order to perform the procedure.

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When blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of
lapo4ka [179]

Answer:

homeostasis

Explanation:

Homeostasis has to do with processes that maintain the internal balance within an organism. It can succinctly be defined as the process of regulating an organism's internal environment. The process of homeostasis is very important in the maintenance of important indicators of balance in the body such as body temperature, body pH, etc.

Hence, when blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of 7.4. This is a homeostatic response.

5 0
3 years ago
Which side of the ruler would you use to measure the length of an I-phone in Biology class and why?
Mekhanik [1.2K]
The inches side because you measure things in inches when it's talking about length not cm unless you have to convert
8 0
4 years ago
Which of the following best defines weather?
yan [13]

Answer:

I think it is C

Explanation:

not 100% sure

6 0
3 years ago
1. What characteristics do the mountains in a mountain range have in common?
lesantik [10]

Answer:

Mountains are prominent landforms that have significant heights above sea level and/or the surrounding land. They are steeper than hills. A mountain or mountain range usually has a peak, which is a pointed top. Mountains have different climates than land at sea level and nearby flat land. Climate is the weather over an extended time period for a specific area. The climate of mountains tends to include colder weather, wetter weather, and thinner air. Thin air refers to the fact that at the higher altitudes of a mountain there is less oxygen to breathe. Also, mountains generally have less hospitable conditions for plants and animals. This leads to quite different evolutionary adaptations for those plants and animals that make higher elevations their home.

6 0
2 years ago
Most nutrient absorption happens in which structure within the digestive system? A. Duodenum B. Stomach C. Large intestine D. Ch
lidiya [134]

Answer:

A. Duodenum

Explanation:

Duodenum is the first part of the small intestine which receives bile juice, pancreatic and intestinal digestive juices. The digestive enzymes present in these juices completes the process of digestion.

The lining of the duodenum has numerous finger-like projections called intestinal villi. The villi are specialized to absorb the digested food by providing increased surface area for the process of digestion. Hence, among the given options, the absorption of digested food occurs in duodenum.  

3 0
3 years ago
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