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3 years ago

What is the relationship between light and depth?

Biology

1 answer:

tiny-mole [99]3 years ago

4 0

If we take the example of sun and water (sea or ocean).

Light from the sun is attenuated by the atmosphere before reaching the surface of the water; underwater, the attenuation is considerable, infrared is absorbed in the first meter and light reaches 100 meters. Beyond 1000 meters is the dark night.

As in all environments, two phenomena contribute to the attenuation of light: Absoption and diffusion.

The absoption of light in the sea is the absorption of photon energy by energy level transition of the atoms and molecules that make up seawater.

Light scattering is a physical phenomenon that occurs when optical inhomogeneities of the medium cause random changes in the direction of the light rays.

The attenuation of light under water is mainly due to absorption, the diffusion being of less importance.

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What happens with insecticides and herbicides that we put on our lawns? A. They end up in bodies of water killing animal and pla

Brums [2.3K]

Correct answer: They end up in bodies of water killing animals and plant life.

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4 years ago

Read 2 more answers

There are 100 cats in a population that follows hardy-weinberg conditions. 4 cats display a recessive white coat color. how many

mr Goodwill [35]

We know that Hardy-Weinberg conditions include the following equations:

$p^{2}+2pq+ q^{2}=1$

where $p+q=1$

And where p = dominant, and q = recessive; this means that $p^{2}$ is equal to the homozygous dominant, $2pq$ is the heterozygous, and $q^{2}$ is the homozygous recessive .

So we have 100 total cats, with 4 having the recessive white coat color. That means we have a ratio of $\frac{4}{100}$ or 0.04. Let that equal our $q^{2}$ value.

So when we solve for q, we get:

$q^{2}=0.04$

$q=\sqrt{0.04} =0.2$

Now that we have our q value, we can use the other equation to find p:

$p+q=1$

$p+0.2=1$

$p=0.8$

So then we can solve for our heterozygous population:

$2pq=2(0.8)(0.2)=0.32$

This is the ratio of the population. So we then multiply this number by 100 to get the number of cats that are heterozygous:

$0.32*100=32cats$

So now we know that there are 32 heterozygous cats in the population.

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3 years ago

A scientist observes that, when the pH of the environment surrounding an enzyme is changed, the rate the enzyme catalyzes a reac

vredina [299]

Answer:

A- A pH change can cause the enzyme to change its shape

Explanation:

A rise or fall in the pH of the medium from the optimum of pH 7 usually affect the enzymes' active sites of and therefore the shape and the rate of enzyme activity.

Assuming the pH is too low, the enzyme medium becomes acidic;Acidosis. The high Hydrogen ions concentration interacts with the R-groups of the amino acids moiety of the enzymes, this interaction affects the ionization of the R-groups, disrupting the ionic bonding holding these R-groups in shape.

This results in loss of the 3-Dimensional shape arrangements of the protein molecule and therefore of the active sites. Since active sites of enzymes determines the specificity of the enzymes substrate- complex to give enzyme-product complex, the catalytic activity of the enzymes decreases, the rate of reaction decreases,and products formation stops, and the reaction also stops.

The same is applicable to extremely high pH=Alkalosis.

However, the effective buffer system of the body prevents this scenarios from happening in real sense in the body. Through mopping by the haemoglobin, excretion by the kidney, etc

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3 years ago

Give examples of how radiation can lead to mutation

statuscvo [17]

Answer:

cystic fibrosis, phenylketonuria, hemochromatosis, Bloom's syndrome, and ataxia-telangietasia. The X-linked recessive diseases are due to mutations in genes located on the X chromosome and include Duchenne's muscular dystrophy, Fabry's disease, steroid sulfatase deficiency, and ocular albinism.

Explanation:

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3 years ago

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lakkis [162]

First is the second and the other one is the 4th

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3 years ago