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IrinaK [193]
3 years ago
15

Which is true concerning how fossils are used as evidence?

Biology
2 answers:
Olenka [21]3 years ago
3 0

Answer:

A ko false B ko true C ko false D ko true

Lana71 [14]3 years ago
3 0

Answer:

D

Explanation:

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Compare hypertonic, hypotonic, and isotonic solutions. When an environment is hypotonic, what happens to the cell?
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When an environment is hypotonic, the cell has more solute so solvent move from outside the cell to inside causing the cell to swell.

WHAT IS TONICITY?

  • Tonicity is the ability of a solution to induce water loss or water gain in a cell. A solution can either be; hypertonic, hypotonic or isotonic

  • A hypertonic solution has more concentration of solute than its surroundings while a hypotonic solution has less concentration of solute compared to it's surroundings.

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Hence, water will move into a cell that is located in a hypotonic environment, causing it to swell.

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Explanation:

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Coughing, oils in skin, cilia that
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The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.

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