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Tamiku [17]
4 years ago
8

Paramecium and other unicellular eukaryotes that live in hypotonic environments have cell membranes that limit water uptake, whi

le those living in isotonic environments have membranes that are more permeable to water. Describe what water regulation adaptations might have evolved in unicellular eukaryotes in hypertonic habitats such as the Great Salt Lake and in habitats with changing salt concentration.
Biology
2 answers:
jeka944 years ago
5 0

Answer: Protists have more permeable membranes than those that are in hypotonic or isotonic environments, they allow more water to enter the cell. They could also possibly develop a higher salt concentration within the cell, they retain the water within it and don't diffuse quickly. The cell will become plasmolyzed without these adaptations. Protists in an unstable salt concentration will have a semi-permeable membrane in order to keep up with the changes in concentration and take in water along with a contractile vacuole in order to pump out any unnecessary water it takes in.

Explanation:

Anna71 [15]4 years ago
4 0

Answer:

The movement water or a solvent through a semipermeable membrane like the cell membrane into a solution of higher solute concentration is known as osmosis. An easy way to learn the net movement of water is that water tends to move to the hypertonic solution. In this question water will have a tendency to move out of the cell (plasmolysis).

Cells could have a higher concentration of salt inside the cell, this would require a mechanism like membrane channels that could facilitate the entrance of salts. This could be complemented with having membranes that are more permeable allowing more water to enter the cell to avoid plasmolisis.

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A fomite is a non-moving object responsible for the indirect transmission of disease.

Fomites are inanimate objects involved in the indirect contact transmission of pathogens. These objects include a whole range of items mostly found in indoor environments.

When pathogens  such as viruses and bacteria come in contact with these objects through various human and animal activities such as sneezing or coughing, use of toilets etc; these pathogens remain active on these objects and can then cause disease when others come in contact with these objects.

<h3>How do fomites transmit infectious agents?</h3>

Some diseases are more likely to be transmitted by pathogens than others. However, several factors can influence whether bacteria on carriers are successfully transferred to humans.

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Sneezing and coughing can transfer bacteria to surfaces  through  droplets released by the sneeze or cough itself, or by bacteria from a sneeze or cough getting on the hands and coming into contact with a bacterial carrier.

To learn more about fomites from the given link

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2 years ago
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Answer:

(C) A difference in the mosquito’s ability to sense insecticide levels

Explanation:

In urban places, insecticides are widely used to fight insects such as mosquito. Some of the insecticides are normally poured in stagnated water  to kill mosquito larvae.

In the situation where two mosquito populations differ in their choice of water which they choose to lay their eggs. It shows one population has more ability to sense insecticide levels.

The other population has less ability that what causes it to lay their eggs in water treated with insecticide. Their larvae will be killed by the pesticide when they hatch.

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Explanation:

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There is a 25% chance that parents who are heterozygous for wavy hair will have a child with curly hair. 
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