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Salsk061 [2.6K]
3 years ago
10

Often, if an investigator needs to add a very small amount of a reagent to a chemical reaction, they will first do a serial dilu

tion as opposed to measuring the chemical directly. Why
Biology
1 answer:
Brrunno [24]3 years ago
5 0

Answer:

The chemical reagents may be defined as the substance necessary to carry out the chemical reactions. The reagents can be consumed fully or partially during the chemical reaction.

The chemical reagents are needed to be diluted serially if they are measured directly without any dilution because this might produce  the faulty colors  an can give incorrect result during the  spectrophotometer. The serial dilution is important to get the correct optical density.

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Lichens that colonize bare rocks are an example of a pioneer
irina [24]

Answer:

C. A hillside that has been cleared by a volcanic eruption.

Explanation:

Pioneer species are hardy species which are the first to colonize barren environments or previously biodiverse steady-state ecosystems that have been disrupted, such as by fire or other natural disasters. Some lichens grow on rocks without soil, so may be among the first of life forms, and break down the rocks into soil for plants.

Hope this helps!

7 0
2 years ago
What type of protein stays only on the surface of the plasma membrane
nevsk [136]

Your answer is the peripheral proteins. Its on the inner or outer surface of the phospholipid bilayer, but not embedded in its hydrophobic core.

4 0
3 years ago
Read 2 more answers
Within the light organ, bacteria are protected and nourished, and rapidly increase in number. At night, they provide the light n
enyata [817]

Answer:

At dawn the squid prepares to hide in the sand for the day and it ejects about 95% of the bacteria from the light organ in order to reduce or stop the growth of bacteria population in the squid. This will prevent the bacteria population from reaching a level too high for the squid to support.

7 0
2 years ago
what is the name of the projections that articulates a superior vertebrae with an inferior vertebrae​
ikadub [295]
This could be the superior and inferior articulate facets
5 0
3 years ago
Two humans mate who are heterozygous for earlobe shape where attached earlobes (A) are dominant to free earlobes (a), and earwax
MariettaO [177]

Answer:

3/16

Explanation:

This question involves two different genes coding for earlobe shape and earwax quality. The alleles for attached earlobes (A) and wet earwax (E) are dominant over the alleles for free earlobes (a) and dry earwax (e).

According to this question, two humans mate who are heterozygous for both genes i.e. AaEe × AeEe. Each parent will produce the following gametes: AE, Ae, aE, ae.

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

* Attached earlobe, wet earwax (A_E_) = 9/16

* Attached earlobe, dry earwax (A_ee) = 3/16

* Free earlobe, wet earwax (aaE_) = 3/16

* Free earlobe, dry earwax (aaee) = 1/16

Hence, the probability of these parents having their first child with dry earwax (ee) and attached earlobes (A_) i.e. genotype A_ee is 3/16.

7 0
3 years ago
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