D) oxygen, carbon dioxide when you breathe in, you take in oxygen and when you breath out, you release carbon dioxide.
Meiosis is a type of cell division that produces gametes where mitotic cell division produce identical chromosomes
The type of active transport which helps muscle cells to contract is called SODIUM POTASSIUM PUMP. In humans, sodium and potassium ions are pumped in opposite direction across the membrane, this builds up an electrical and chemical gradients which drive other transport processes.
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In biology, an organism is any individual living thing. It is easy to recognize a living thing, but not so easy to define it. Animals and plants are organisms, obviously. Organisms are a biotin, or living, part of the environment.
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