The correct option is C.
Pilli is a long protein filament which attach reproducing cells together during conjugation. This attachment allows the cells to exchange the genetic materials, that is, plasmid between them.
Do you mean by-product? Because in that case no. Oxygen is not a by-product of the Krebs Cycle, but Carbon Dioxide is.
This contributes to brand new brain cells and it increases the number of pathways for oxygen, energy, and to remove waste from the brain. Aerobic exercise<span> is the most beneficial type of </span>exercise<span> on the </span>nervous system<span>. ... </span>Exercise<span> improves your cognitive function and makes you more alert, as well as reduces stress.</span>
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Step by step solution you are aging not losing so I can’t be losing
Hope this helps tell me if I got it right or wrong