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sergeinik [125]
3 years ago
12

Why is selectively permeable better than totally permeable or totally impermeable?

Biology
1 answer:
Vlad [161]3 years ago
3 0
Because it allows only certain substances to permeate. If it was totally permeable that would be good enough to having no barrier as it would let everything though. Totally impermeable means that nothing would get through.
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Jimmy is riding in his car to the office. It is snowing heavily and he can see frost forming on the windowpane. Which type of wa
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Which of the following best describes cell communication processes that are present in bacteria, yeast, and multicellular organi
Savatey [412]

Answer:

They release chemical messengers to communicate with cells they may or may not be in direct contact with.

Explanation:

Unicellular organisms such as bacteria or yeast, 'talk' to each other through the release of chemicals. In bacteria, this is known as quorum sensing which allows them to determine the surrounding bacterial population density. In yeast, one of the more popular pathways is known as the mating factor pathway, which allow the organisms to find mates. Whereas, in multicellular organisms (such as humans), this chemical release allows for cell-cell co-ordination which keeps the system functioning correctly.

5 0
3 years ago
Carrot slices placed in a 0.2 M salt solution for several hours become flaccid (limp). Carrot slices placed in fresh water for s
SpyIntel [72]
<h2>Carrot in 0.2M salt solution</h2>

Explanation:

  • Carrot cuts put in 0.2M salt answer for a few hours gets flabby (limp).
  • Carrot cuts set in freshwater for a few hours gets <em>turgid  (firm).</em> From this, we can conclude that such as.  
  1. Freshwater is hypertonic and the salt arrangement is hypotonic to the cells of the carrot cuts.
  2. <em>Freshwater and salt arrangement are both hypotonic</em> to the cells of the carrot cuts.  
  3. Freshwater is isotonic and the salt arrangement is hypertonic to the cells of the carrot cuts.  
  4. <em>Freshwater is hypotonic</em> and the salt arrangement is hypertonic to the cells of the carrot cuts.  
  5. Freshwater and the salt arrangement are <em>both hypertonic to the cells of the carrot cuts.</em>
5 0
3 years ago
Camouflage helps predators to survive by hiding them from what
Alborosie

Answer:

Organisms use camouflage to mask their location, identity, and movement. This allows prey to avoid predators, and for predators to sneak up on prey. ... The physical characteristics of the organism are important. Animals with fur rely on different camouflage tactics than those with feathers or scales, for instance.

Explanation:

3 0
3 years ago
When testing diffusion over a selectively permeable membrane, you placed different liquids into special containers. The proper s
elena-s [515]

When testing diffusion over a selectively permeable membrane, the proper setup is aimed at putting different concentrations into tubes and the same water volume.

<h3>What is a selectively permeable membrane?</h3>

A selectively permeable membrane is a physical barrier that allows the passage of certain substances but not others.

The cell membrane is a  selectively permeable membrane that cells need to interchange nutrients and waste with their environment.

In conclusion, a suitable experiment to show the process of diffusion in a selectively permeable membrane is to put concentrations of the solute into tubes and the same volume of solvent (water).

Learn more about selectively permeable membranes here:

brainly.com/question/227810

#SPJ1

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2 years ago
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