Answer:
Because of the chemical and structural nature of the phospholipid lipid by layer the lipid soluble molecule can just pass the lipid membrane and some small molecules can also pass freely.
Explanation:
as we know that the homeostasis is an important process for a living cell to maintain it self so for the the exchange of materials between the external and internal environment is must so for that it exchange material with the outside environment of the cell.as the cell membrane is semipermeable(mean allow some molecule to pass(lipid soluble) and not others(lipid non soluble) to pass through the membrane.the cell membrane is selectively permeable due to its nature and chemical composition the chemical composition is lipid and phosphate and glycerol(head) with fatty acid that may b saturated or unsaturated(tail).so finally all those molecule which are polar can not pass through the membrane and non polar can pass the membrane.The size of the molecule is also a factor on which the permeability depends.
Pyroclastic flows,lava flows and lahars are hazardous. Geothermal energy is beneficial.
Volcanic ash and volcanic materials can be both hazardous and beneficial.
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The lactic acid that is building up in his muscles will eventually cause him to stop exercising. The burning sensation comes from the build up of that lactic acid in his muscles.
Deletion because it is a loss of the chromosomal segment like the mutation deleted the segment
