6. Which of the following statements is true about fossil fuels, carbon, and carbon dioxide? a. Carbon dioxide returns to the atmosphere as carbon when fossil fuels are burned.
b. Fossil fuels return to the atmosphere as carbon dioxide when carbon is burned.
c. Carbon returns to the atmosphere as carbon dioxide when fossil fuels are burned.
d. none of the above

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.

Alright, i'm gonna try to explain this as good as possible. the law of conservation is like a collection overtime. it never changes though. no matter how you change the constituent parts.

The answer is !