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3 years ago

Which non nutritive artificial sweetener should be avoided by someone who has phenylketonuria (pku?)?

1 answer:

3 0

Aspartame is very high in the protein, phenylalanine

Individuals with PKU are unable to metabolize this protein from their bodies & it builds up in toxic levels. Anything containing artificial sweeteners, like aspartame, or are very high in phenylalanine should be avoided to minimize the chances of complications.

Hope that helps!

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Over the years, there has been an overuse of antibiotics. This overuse has resulted in more less resistant and weaker bacteria t

Charra [1.4K]

Answer:

The correct answer is - B.directional selection.

Explanation:

When a bacterial colony is exposed to an antibiotic the maximum number of the bacteria dies due to noo resistane and some of survive even with no or very less resistance to the antibiotic and reproduce.

Over many generations the survived and continuosuly divivng resitant bacteria become more and more with higher frequency and ultimately evolved to a resistance strain of the bacteria for the antibiotic. Such mutation is directional selection as the frequency of the resistance bacteria going from no resistance to a high amount of resistance is unidirectional and progresive.

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3 years ago

Describe the sources, types, and effects of varying pollutants

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Pollutants can be stated as the substance which affects the environment and it causes lots of not wanted effects.

Explanation:

Types of pollutants:

1.Air pollution

2. Water pollution

3. Soil pollution

Sources of Air pollution:

Sources of Air pollution are listed below pollution causing substances from vehicles.
Then the polluting substances from power plants and industries
Then emission of wood and stuff

Effects of Air pollution:

The effects of air pollution include can lead to respiratory problems.

Sources of water pollution:

The sources of water pollution include radioactive substances, disposal from sewage waste disposal from industries and factories.

Effects of water pollution:

The effects of water pollution include it kills the living organisms in water bodies and it contaminates the water bodies

Sources of land pollution:

The source of land pollution comes from the contamination and waste disposal of human wastes, then the mining activities will lead to the contamination of land pollution and nuclear waste

Effects of land pollution:

The contamination of land pollution causes an increase in Landfill, soil pollution and it will lead to human health disorder and sometimes it will lead to endangered species of animals

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3 years ago

How does the cardiovascular system help the body maintain homeostasis?

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Answer:

The cardiovascular system helps maintain homeostasis by continually supplying the central nervous system--the brain and spinal cord--with oxygen and glucose. Brain cells start dying after just one minute without oxygen. The brain is the control center for all of the body's homeostatic processes.

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3 years ago

Scientists have observed the exponential growth of lionfish in the Caribbean Sea. Which of these predictions about the future of

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Answer:

overpopulation and it because harmful and hard to control and possibly will diminish the number of normal fishes by killing them with their dangerous life threatening spikes

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3 years ago

Movement of the chromosomes during anaphase would be most affected by a drug that prevents which of the following events in mito

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The correct answer is: C) shortening of microtubules

Chromosome movement is possible thanks to changes in microtubule length. Several types of microtubules are involved. First, during the anaphase kinetochore microtubules shorten and consequently the chromosomes move toward the spindle poles. Then the astral microtubules that are anchored to the cell membrane pull the poles further apart. At the end of anaphase, the interpolar microtubules slide past each other and that additionaly separate the chromosomes.

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3 years ago