I think it is D but I might be wrong !!! Hope I help !!
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
Answer:
oxygen because
Explanation:
because u can survive 3 days with out it and if u did not have oxygen u would suffocate
Answer: Human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed biologically, we humans are Hono Sapines, a culture-bearing upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.
The correct option is B.
Mitochondria is one of the membrane bound organelles that is found in living cells. It is called the power house of the cell because it is responsible for providing energy for the life sustaining activities of the cells. Mitochondria possesses an outer membrane and a highly convoluted inner membranes.The convoluted portion of the mitochondria provides a large surface area for the occurrence of biochemical reactions<span />
