The relative size between the earth and moon are so close some refer to its as a?

The earth-moon relationship is unique in many ways. It is the largest moon in the solar system relative to its host planet. The relative size between theearth and moon are so close, some refer to it as a binary planet system. As it is simply a a relationship between a planet and its moon, the system is called a binary system.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

The gens present in the dna in the nucleus of the cell in the body