Three reasons a species could become extinct include, deforestation, being overhunted, not enough food available.
Answer: Option 4.
The fresh water is hypotonic and the salt solution is Hypertonic.
Explanation:
Hypotonic solution is a solution that have little dissolved solutes i.e low osmotic pressure compare to other solution. When a cell is put in hypotonic solution, it take in water and the cell swell up and it does not burst due to it's cell wall thereby becoming turgid or hard.
Hypertonic solution is the solution where the concentration of solute is higher outside the cell than inside the cell. Example is saline water.when a cell is placed in Hypertonic solution it will shrinks because it losses water.
The right answer is both of them.
Take the example of fatty acids, it is an aliphatic chain carboxylic acid composed of 4 to 36 carbon molecules. The more carbons (and therefore the CC and CH bonds), the more the fatty acid will be rich in energy since it will give more ATP during its catabolism, and it will also be less and less soluble in water because the carbon chain is hydrphobic.
