Other than global warming is Desalinezation.
The evolutionary effects of the genetic drift are the greatest when the population is small.
In small populations, genetic drift can significantly change the frequencies of the alleles and affect the genetic structure of the population. In big populations, the effects of the genetic drift are small and insignificant.
The correct answer is: A. The hydrophilic head groups of the lipid molecules are exposed to the outside of the cell and the cytoplasm, which is a water-like environment. The hydrophobic tails form an oily layer inside the membrane that keeps water out of the cell.
Plasma membrane of the cell is arranged in a bilayer of phospholipids. Phospholipids are amphipathic molecules which means that they have both hydrophilic and hydrophobic regions. The hydrophilic heads of phospholipids that are faced outward and hydrophobic layer located in the interior of the bilayer together make a good barrier between the interior and exterior of the cell, so the water and other polar or charged substances cannot easily cross the hydrophobic core of the membrane.
Answer:
Plant cell seems less affected by the changes in solute concentration due to presence of cell wall.
Explanation:
The principle difference between plant cell and animal cell is that plant cell contain cell wall but animal cell does not.
The presence of cell wall prevent the osmotic lysis of the cell when the cell is kept in a hypotonic solution.
In case of plants the solute concentration of cytosol is greater than that of extracellular matrix.The entry of water inside the plant cell increases the turgor pressure that pushes both cytosol and plasma membrane against the rigid cell wall.
The pair of structures that best shows how plant cells are
different from animal cells are chloroplasts and cell walls. The answer
is B.
