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Ahat [919]
3 years ago
6

Paint and solvents pose no potential hazard to human health. Please select the best answer from the choices provided T F

Biology
1 answer:
liq [111]3 years ago
6 0

Ans.

Solvents are those substances that dissolve some other substances. Solvents used in paint industry include turpentine and mineral spirits. Paints and such solvents contain many volatile organic compounds, such as formaldehyde, xylene, and toluene.

These compounds are hazardous, which may cause severe breathing problems and other health related issues (headaches, nausea, and dizziness) in humans.

Thus, the given statement is false.

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A covalent bond is a chemical bond which involves the sharing of atoms.
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Reasons for deforestation ?<br>​
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Agricultural Activities

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Natural causes as hurricanes, fires, parasites and floods.

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How do plate tectonics explain the formation and metamorphic rocks?
Serga [27]

Metamorphic rocks are formed from other rock that has been subjected to very high temperature and pressure.

When one of the earth's plates comes in contact with another either by both traveling opposite directions, straight into each other, or from one slipping under the other (subduction zone), the pressure/friction of the plates against each other melts the rocks and after they cool they are metamorphic. Example is in Washington state when the Juan de fuca plate is going under the North American plate the pressure/friction of this melts the rocks which then form metmorphic rock.

4 0
3 years ago
You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat, and the r
Genrish500 [490]

The question is incomplete. Here is the complete question.

You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat and the rest have a dark coat. You know that light coat color is recessive in ground squirrels. What is the allele frequency for the light coat allele  and the dark coat allele? How many of the dark coated individuals do you expect to be heterozygotes at the coat color gene? Assume the population is at H-W equilibrium.

Answer: Allele frequency for light coat: q = 0.3;

              Allele frequency for dark coat: p = 0.7;

             There will be 42 heterozygote;

Explanation: A population in H-W equilibrium is a population which doesn't change from one generation to the next if there are no disturbing factors, as migration or mutation.

It follows the equation: p^{2}+2pq+q^{2}=1.

p represents the frequency of the dominant allele;

q represents the frequency of the recessive allele;

2pq represents heterozygote individuals;

The sum of frequencies of both alleles must be 1, i.e.: p+q=1

For the population of squirrels:

  • Frequency of recessive allele

q^{2} = \frac{9}{100}

q = \sqrt{\frac{9}{100}}

q = 0.3

  • Frequency of dominant allele

p+q=1

p=1-q

p=1-0.3

p = 0.7

  • Frequency of heterozygote

2pq = 2*0.7*0.3 = 0.42

In a population of 100 individuals: 0.42*100 = 42

The allele frequency for the light coat is 0.3; for the dark coat is 0.7.

It is expected to have 42 heterozygote individuals in this population.

3 0
3 years ago
Match the time period with the correct layer of fossils (mya = millions of years ago). ITEM BANK: Move to Bottom 175 mya250 mya4
Marrrta [24]

Answer:

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