The cytoplasm and the nucleus together are known as the protoplasm, the living matter of the cell.
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N20 is an element because it is on the periodic table and doesn't have anything else attached to it. NO would be a compound because it has oxygen attached to it.
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Scientific method is not developed in the 1800s
Pili are the filaments that help some bacteria stick to surfaces and exchange plasmids through conjugation.
Pili are hollow, hair like appendages that are found on the surface of some bacterial cells. Pili are composed of a special protein (known as pilin). Pilia act as a means of attachment of bacteria to surfaces (such as their host) and it is also used by bacteria to exchange their genetic material (plasmids) in the mating process between cells (known as conjugation).
<span>Food chains and webs not only describe the order in which organisms are eaten, but they also describe the flow of energy in an ecosystem ...
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