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andrew-mc [135]
3 years ago
10

Physical characteristics of down syndrome

Biology
1 answer:
Arada [10]3 years ago
4 0
Down syndrome causes a distinct facial appearance, intellectual disability, developmental delays, and may be associated with thyroid or heart disease.

mark me brainliest
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You measure the pH of your backyard soil and find it is 7. You measure the pH of your friend's backyard soil and find it is 4. H
olchik [2.2K]

Answer:

1000 times.

Explanation:

Hello,

In this case, since the pH is defined by:

pH=-log([H^+])

If we want to compute the concentration of hydrogen we must write:

[H^+]=10^{-pH}

Thus, for both the backyard soils we compute:

[H^+]_{pH=7}=10^{-7}=1x10^{-7}M

[H^+]_{pH=4}=10^{-4}=1x10^{-4}M

It means that:

\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}} =\frac{1x10^{-4}M}{1x10^{-7}M}\\ \\\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}}=1000

It means that the concentration of hydrogen at a pH of 4 is 1000 times greater than the concentration of hydrogen at a pH of 7.

Regards.

4 0
3 years ago
A point mutation changes the DNA sequence CGA to CGT, but the same protein is still produced. Which point mutation occurred? A.
iren [92.7K]
The answer is <span>C.silent.

Nonsense, missense, silent, and frameshift mutations are point mutations. The point mutations are the change in a single nucleotide base on the DNA molecule. In a missense mutation, the change in a single nucleotide base results in a codon coding for a different amino acid. In a nonsense mutation, the change in a single nucleotide results in a stop codon or in a nonsense codon. Frameshift mutation, due to addition or deletion of a base, results in the change of reading frame and totally different translation. In all these cases, the change could lead to different of nonfunctional protein translation.
Silent mutation, on the other, means that change in a nucleotide base will no affect amino acid. It will result in a different codon, but the one that code for the same amino acid, so the same protein will be produced.

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7 0
3 years ago
Read 2 more answers
Help! Please I really don’t know this
Varvara68 [4.7K]

Answer:

this is chemistry not biology

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3 years ago
Define the five systems of the biosphere be sure to include information to distinguish each system from the others
Virty [35]
Hello!

By the most general biophysiological definition<span>, the </span>biosphere<span> is the global ecological</span>system<span> integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and </span>atmosphere<span>.
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Hope this Helps! Have A Wonderful Day! :) 
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3 years ago
An important feature of modern classification systems is that they
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Show differences between species/organisms
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