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tia_tia [17]
3 years ago
7

An example of a physical contaminant is a

Biology
1 answer:
Zinaida [17]3 years ago
3 0

Answer:

Common examples of physical contaminants include hair, bandages, fingernails, jewelry, broken glass, metal, paint flakes, bone, the body parts of pests, or pest droppings.

Explanation:

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Which of the following does not describe enzymes?
Oksanka [162]

The statement 'enzymes work by raising the energy of activation' is NOT true about the enzymatic activity. These proteins lower this energy.

<h3>Enzymes and activation energy</h3>

Enzymes are proteins capable of catalyzing specific chemical reactions in a given medium.

Enzymes work by lowering (instead of increasing) the activation energy of a chemical reaction.

Enzymes help to convert one or more reactants into specific products of the reaction that they catalyze.

Learn more about enzymes here:

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How do our social groups and social interactions impact our behavior?
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Answer:

it makes us addict to fame and people would do anything to be higher up in the social groups

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3 years ago
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Hydroxylamine is a mutagen that acts only on cytosine and causes C--&gt;T and G--&gt;A base pair changes (i.e. it causes transit
natulia [17]

Options for the question are not given. They are as follows:

a. arg or lys

b. ala

c. thr

d. leu or ser

e. Only termination codons

Answer:

d. leu or ser

Explanation:

Four codons code for proline amino acid. These are CCT, CCC, CCA, and CCG. Hydroxylamine causes C to change into T or G to change into A.

If first position is changed in each codon:

CCT = TCT (UCU)

CCC = TCC (UCC)

CCA = TCA (UCA)

CCG = TCG (UCG)

These codons produce Serine amino acid.

If second position is changed in each codon:

CCT = CTT (CUU)

CCC = CTC (CUC)

CCA = CTA (CUA)

CCG = CTG (CUG)

These codons produce Leucine amino acid.

Hence, out of the given options, option d. leu or ser is correct.

7 0
3 years ago
A region in the southern United States has seen a steady increase of the depth of its water table over the past 20 years. What d
Irina18 [472]

The groundwater is being discharged faster than it is being recharged is the data suggested.

Option D

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Ground water level is the level of underground storage of water above the impermeable rock layer. The underground water is getting filtered through different layers of permeable rocks before it enters the final layer. So it’s fresh and ready to be consumed as it is taken out. Thus for centuries, it’s being used as the source of drinking water.

But with increasing population, the ground water is being consumed at the rate very faster than it can be refilled from different sources like precipitation, rivers and other water bodies. So its level tends to get lower and lower as this continues until the point it gets finished.  

8 0
3 years ago
What is puberty for boys?
Mashutka [201]

When boys go through puberty their voices change and they start to grow hair on different area of their body such as their chest, face and pubic area. Also they will start to get acne

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