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UkoKoshka [18]
3 years ago
15

What is the essence of the catalase test?

Biology
1 answer:
garik1379 [7]3 years ago
8 0

Explanation:

Catalase test demonstrate the presence of an enzyme called catalase, that catalyses the release of oxygen from hydrogen peroxide. It is used to tell the difference between the non-catalase producing bacteria from those bacteria that produces an enzyme catalase. Catalase is produced by the bacteria that respire using oxygen. If an organism produces catalase, bubbles of oxygen are produced when hydrogen peroxide is added to it.

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3. If an engine exerts 250N of force and moves an object 6.0 meters, how much work did it do? 06
mixer [17]

Answer:

1500J

Explanation:

work =force *distance

250*6=1500

8 0
3 years ago
DNA evidence analysis is an imperfect science. Provide two reasons why this may be the case
Licemer1 [7]

Answer:

Because DNA analysis requires interpretation which can have errors or mistakes because interpretations are subjective no matter how many people agree with your interpretation even if it is right.

Explanation:

7 0
3 years ago
Explain why there is glucose ni urine​
sattari [20]

This could be because someone has Glycosuria. Glycosuria is what happens when your kidneys can not take out enough sugar from your blood vessels and in turn passes it through urination. This is usually not a good thing to have as it could tell you that your kidneys do not function as good as they should. This is something that is not dangerous to your life, but does need to be looked at because it tells you that your kidneys are weaker than they should be and might lead to other complications later in life.

7 0
3 years ago
Read 2 more answers
Identify which type of natural selection is described in each case below.
ICE Princess25 [194]

Answer:

Results in the evolution of the species: Directional selection

Results in new species: Disruptive selection

Favors traits at the two extremes: Disruptive selection

No increase in diversity: Directional selection

One extreme trait is favored: Directional selection

Diversity decreases: Stabilizing selection

Diversity increases: Disruptive selection

Explanation:

Directional selection which is also known as positive selection is known to be a mode of natural selection. In this type of selection, an extreme phenotype is favored over other phenotypes. This makes the allele frequency to move in the direction of that phenotype and this takes place over time.

Disruptive selection (known to be diversifying selection) talks about the certain changes in the population genetics whereby extreme values of a particular trait are favored over intermediate values. This results in new species.

While Stabilizing selection is a natural selection whereby there is a stabilization of the population mean on the particular value of a non-extreme trait. Here the diversity is decreases.

3 0
3 years ago
In summer squash, white fruit color (W) is dominant over yellow fruit color (w) and disk-shaped fruit (D) is dominant over spher
Angelina_Jolie [31]
P:    WWDD x wwdd
Formed gametes are WD and wd
F1 generation: WwDd all phenotypes are white and disc-shaped (dominant traits are expresed)
F2 generation: 9  :  3  :  3   :   1 are ratios of phenotypes (white and disc-shaped : white sphere-shaped : yellow disc-shaped : yellow sphere shaped).   <span> <span><span> <span>
</span></span><span><span> </span> </span> </span></span>

6 0
3 years ago
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