Answer:
By the process of cellular differentiation which consists of physical and functional changes of the cell used by processes at the genetic level. The expression of these in each type of cell is different. That is to say that the type of cell follows at a time of development there is differential activation of some genes and repression of others
Immune System is the system that consists of proteins and cells.
Answer:
The correct answer will be- Option-A
Explanation:
The Theory of Island Biogeography was proposed by the MacArthur and Wilson's in 1967 which proposed that the number of species-immigration and extinction rates are determined by the size of the island and distance of the island from the mainland.
The suggestions made by them are:
1. The islands which remain farther from the mainland receive very few species as compared to the closest mainland.
2. Smaller island shows a high rate of species extinction as compared to the larger island.
Thus, option-A is the correct answer.
Answer:
Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.
The right answer is internal thermoreceptors
The olfactory receptor adapts to the external environment in which we are, for example, when we put perfume on ourselves, we feel it at the beginning and then we do not smell it anymore.
External thermoreceptors such as those located in the hand adapt to the temperature to which it is in contact. When we put our hands on a cold object we just feel it at the beginning.
The good example to explain the non-adaptability of the internal thermoreceptors is when you have a fever, for several days you have this sensation of heat inside our body. It disappears only when the temperature drops
