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kotykmax [81]
3 years ago
9

Is density useful in identifying unknown substances?

Biology
1 answer:
Zarrin [17]3 years ago
6 0

Answer:

Yes

Explanation:

You can identify an unknown substance by measuring its density and comparing your result to a list of known densities.

Density = mass/volume

When you divide the mass by the volume and compare the density to a list of known densities.

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Roan coat color in cattle develops through incomplete dominance of the gene for red color and its allele for white. what crossin
slava [35]
<span>Roan is a combination of white hairs with red hairs. When we see cattle like this, they look pink because it resulted from a mix of white and red.

Red allele: A
White allele: a
</span>
<span>A heterozygotic animal has this genotype: Aa
Like i said previously this is the mixture of colors so the animal would be pink.

A red coat color has this genotype: AA
A white coat color has this genotype: aa

To get all the herd to be</span><span> roan-colored cattle the combination of parents should be: AA x aa. -> 100% roan
Another possible way to obtain would be</span><span>roan-colored cattle: Aa x Aa or aa x Aa (in this case there would be less probabable to obtain road).</span>
8 0
3 years ago
Defend this statement: The sun is the driving force behind the water cycle.
polet [3.4K]
Well part of the water cycle is evaporation which come from heat which you get from the sun. When the water evaporates it goes into clouds so then it can rain.
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8 0
3 years ago
EcoRI is a common _________________ used to cut DNA for cloning. A) DNA ligase B) DNA polymerase C) RNA polymerase D) restrictio
hichkok12 [17]
The answer is D because <span>Restriction enzyme.</span><span> Restriction </span>enzymes<span> are used to cut </span>DNA<span> for later use in </span>biotechnology<span>.</span>
6 0
3 years ago
Which of the following is NOT a solution to protect the water in the two wells in danger of becoming contaminated?
Anton [14]

Answer:

The correct option is C. Building a well between the two wells that goes deeper into the earth would not stop the water from being polluted .

Explanation:

Even if a well was constructed between the wells B and C, it wouldn't have stopped the contamination of the water. As the oil would still be leaking and it would contaminate the wells.

All of the other options can be used to stop the contamination.

Option A suggests building an impermeable membrane that would stop the oil flow. Hence, the water in the wells will not be contaminated.

Option B suggests not using the water from the wells and using an alternate water supply. The alternate water supply wouldn't be contaminated with oil.

Option D suggests chemically purifying the contaminated water. This can be an effective technique to clean the contaminated water.  

7 0
3 years ago
Which is found in the highest concentrations in the atmosphere?
saveliy_v [14]

Answer: By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.

Explanation:

5 0
3 years ago
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