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1-Modern replica of van Leeuwenhoek's microscope. As microscopes improved, scientists made more discoveries. In 1839, two German scientists, Matthais Schleiden and Theodore Schwann, viewed plant and animal tissues under a microscope. They concluded that all plants and animals were made up of cells
2-Pasteur's experiment with the flasks helps disprove the idea that living things could just appear or come from nonliving things like water and air because the flask without a lid grew microorganisms that cam from a living thing not air or water
3-Nutrients are chemical substances found in every living thing on Earth. They are necessary to the lives of people, plants, animals, and all other organisms. Nutrients help break down food to give organisms energy. ... Autotrophs are organisms that can make their own food.
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