The cell membrane is also called selectively permeable membrane for the sole reason being it is selective in nature.
It forms a physical barrier and as a barrier between the cell and the external environment as it allows only selected necessary molecules to pass through it and at the same time prevents entry of unwanted / unnecessary substances.
It also regulates the entry and exit of molecules into and out of the cell.
The cell membrane permits the entry of vital molecules like
<span>water, oxygen, amino acids and glucose into the cell as they are crucial for various life processes and at the same time metabolic waste products are expelled through the cell membrane.</span>
According to Mendel Law of segregation all offspring in F1 generation will white wool. However, in F2 generation three will be white wool and only one offspring will be spotted wool.
Phenotype (parental generation) White wool x spotted wool
Genotype TT tt
F1 generation Tt, Tt,Tt, Tt (white wool)
Self cross Tt x Tt
F2 generation TT, Tt, Tt, tt
white wool = 3
spotted wool = 1
The population of predators would decrease since they had nothing to eat they would starve and die so the answer is B.
If the immune system fails to produce proteins (Antibodies) it can cause a disease. This is because our immune systems are very needed so if our immune system decides to fail to produce its proteins, our body will become overwhelmed and could possibly cause us to die! :(