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user100 [1]
3 years ago
15

Why do microbiologists need to isolate bacterial colonies from a specimen? quzilet?

Biology
2 answers:
vekshin13 years ago
7 0

Specimens taken from a patient sample usually contain a mixture of different bacteria. But sample with only one type of bacteria, are necessary to study a bacterial species accurately. Therefore, it is necessary to isolate all of the possible disease causing organisms in order to study the sample by itself. Once isolation of individual colonies is done, then these colonies can be used for identification tests. A sample of the specimen is move very fast onto an agar plate in order to physically separate the bacterial colonies.


saul85 [17]3 years ago
3 0
This is because the specimens  will usually have more than one kind of bacteria, therefore they have to isolate a specimen to study it by itself.
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Use the animals listed to make a food web
anastassius [24]

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4 0
3 years ago
The correct answer will get Brainliest!
Leto [7]

Answer:

Diversity of the community = 2.097

Explanation:

Given:

Number of pitch pines = 134

Number of douglas firs = 24

Number of red pines = 53

Find:

Diversity of the community

Computation:

Simpson's diversity index = N(N-1)/Σn(n-1)

Particular              n n(n-1)

Pitch pine         134       17822

Douglas firs       24 552

Red pine            53  2756

Total       N=211 21130

So,

D= [211(211-1)] / 21130

D = 2.097

Diversity of the community = 2.097

7 0
2 years ago
How is a hummingbird getting nectar from a flower an example of mutualism?
horrorfan [7]
Mutualism is when both sides benefit. The hummingbird gets nectar and the flower is benefited because the hummingbird that has been to other flowers carry pollen on its body which spread the flower when it sucks its nectar, therefore pollinating the flower in the process.
7 0
3 years ago
When a plant is dying the worms dig air holes down to their roots which also gives the worms a place to live.
nikklg [1K]
This is mutualism because both species benefit
6 0
3 years ago
Imagine that you are studying the control of β-globin gene expression in immature red blood cells (mature red blood cells contai
lozanna [386]

Answer:

Silencer

Explanation:

Silencers are the position and orientation free sequences that are present outside the protein-coding sequence of a gene. Silencers serve as a binding site for some transcriptional regulatory proteins that tend to inhibit gene expression. Binding of these "repressor" proteins to the silencers inhibits the gene expression.

The deletion of silencers from DNA would increase the rate of the gene expression as the inhibitory transcription regulatory proteins do not have binding sites to inhibit the gene expression. Therefore, the deletion of silencer sequences of the beta-globin gene would have caused the increased rate of its expression.

8 0
2 years ago
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