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vodomira [7]
3 years ago
5

Suppose you live in the mountains and collect surface water for your drinking resource. If the water looks clear, should you use

it for drinking?
A. No, the water looks clear but it may contain harmful bacteria or high levels of harmful chemicals in the water

B. Yes, because if the water is clear then there are microorganisms that feed on pollutants and should be safe to drink as well

C. No, because if the water is clear it should be free of pollutants

D. Yes, because if the water is clear then its obviously safe for drinking
Biology
1 answer:
jeyben [28]3 years ago
4 0

Answer:

The answer is A ( No, the water looks clear but it may contain harmful bacteria or high levels of harmful chemicals in the water.)

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The process by which organisms with traits well suited to an environment survive and to produce offspring is
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3 years ago
Starting from the sun, create a food chain including at least three organisms. Explain how energy is transferred through the cha
Kryger [21]

Answer:

The food chain showing seven organisms can be drawn as follows:

Plants → grasshoppers → mice → frog → snakes→ eagles → decomposers

The plants are the primary source of food in a food chain or a food web. The animals which feed on plants will be termed as herbivores or primary consumers like the grasshopper. The organisms feeding on primary consumers will be the secondary consumers like mice.

An energy pyramid for three of the organisms can be shown as follows:

              mice (10 kilocalories)

                   ↑

        Grasshoppers (100 kilocalories)

                   ↑

       Plants ( 1000 kilocalories)

As the energy pyramid shows, only about 10% of the energy travels from one trophic level to another.

Explanation:

6 0
2 years ago
Which of the following patterns in the fossil record would be an example of an organism evolving through punctuated equilibrium?
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D

Punctuated equilibrium is a series of small, gradual changes over long periods of time.
6 0
3 years ago
Which describes the variable that is changed to test the prediction
slavikrds [6]

D)independent

Explanation:

An independent variable is a variable that is changed to test the prediction in an experiment. Independent variables are the cause in an experiment. They are the ones that produces the effect.

  • Changing independent variables produces different effects in an experiment.
  • These effects are the dependent variables
  • Independent variables do not depend on the outcome of the experiment.
  • They are the ones that determines how a reaction proceed and what might likely happen.

learn more:

Experiment brainly.com/question/5096428

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6 0
3 years ago
In a certain mutant strain of bacteria, the enzyme leucyl-tRNA synthetase mistakenly attaches isoleucine to leucyl-tRNA 10% of t
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Answer:

The correct answer is "proteins in which isoleucine is inserted at some positions normally occupied by leucine".

Explanation:

The missing options of this question are:

A. proteins in which leucine is inserted at some positions normally occupied by isoleucine.

B. proteins in which isoleucine is inserted at some positions normally occupied by leucine.

C. no abnormal proteins, because the ribosomal translation machinery will recognize the inappropriately activated tRNAs and exclude them from the translation process.

D. no proteins, because the inappropriately activated tRNAs will block translation

The correct answer is option B. "proteins in which isoleucine is inserted at some positions normally occupied by leucine".

In normal conditions, the enzyme leucyl-tRNA synthetase attaches one leucine amino acid to leucyl-tRNA as part of synthesis of proteins that have one or more leucine residues in their sequences. Since the enzyme of this mutant strain of bacteria mistakenly attaches isoleucine to leucyl-tRNA 10% of the time, approximately 10% of all the proteins that normally have leucine residues will going to have isoleucine. Therefore, These bacteria will synthesize proteins in which isoleucine is inserted at some positions normally occupied by leucine.

3 0
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