I know it's long but I hope it helps you (•‿•)
Answer:
Louis Pasteur, by observing that the microbes were in the air and contaminated the broth helped determine that all the cells came from pre-existing cells (option b), one of the postulates of the cell theory.
Explanation:
Louis Pasteur's experiments, conducted around 1860, showed that unicellular organisms appeared in a culture broth only if it was exposed to the air, where other microorganisms were present, thus disproving the hypothesis of spontaneous generation.
On the other hand, in the broth that was not exposed to the air Pasteur did not observe microorganisms.
By rejecting the hypothesis of spontaneous generation through his experiment, Louis Pasteur reaffirmed the postulate of the cell theory that proposes that all cells come from preexisting cells.
The other options are not correct due to:
<em> a and c. </em><em><u>All animals are made of cells
</u></em><em> and </em><em><u>cell is the basic functional unit of living things</u></em><em> are postulates of the cellular theory that were not demonstrated by Pasteur's experiment.</em>
<em> d. </em><em><u>Unicellular organisms inherit an exact copy of DNA from the parent cell</u></em><em> is not a postulate of cell theory.</em>
Answer:
Seasons are caused by the Earth's auxiliary tilt. As the Earth revolves around the sun the tilt causes the Northern ans Southern hemispheres to trade places.
Explanation:
Answer:
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Explanation:
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The symptoms of listeriosis develop a few days after eating contaminated food, but it may take as long as 30 days or more before the first sign and symptoms of infection begin. The listeriosis symptoms include fever, muscle ache, Nausea and diarrhea .The listeriosis may spread to the nervous system which led to sign and symptoms such as stiff neck and headache
