What technological advancement was nessary before scientists could begin to observers cells?

microscopes

Explanation:

microscope help see smol objecs plz mark braniest

The Technological advancement that was nesscary before scientists could begin to observe cells would be MICROSCOPES .

Explanation: The answer would be microscopes because microscopes are used to see the little things on earth that can not be seen by the naked eye.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

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