9.Write the contribution of a)Robert Brownb)Leeuwenhoek
Answers
Answer:
a)Robert brown - discovery of the nucleus and its role helped to prove the cell theory, which states that all living organisms are composed of cells and cells come from pre-existing cells. Other discoveries and contributions of Brown include: The discovery and naming of over 2000 species of plants.
b)A largely self-taught man in science, he is commonly known as "the Father of Microbiology", and one of the first microscopists and microbiologists. Van Leeuwenhoek is best known for his pioneering work in microscopy and for his contributions toward the establishment of microbiology as a scientific discipline.
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ROBERT BROWN WAS TGE THE FIRST PEESON WHO FOUND OUT NUCLEUS IN THE ROOT CELL OF ORCHID.
LEEUWENHOEK WAS THE PERSON WHO FOUND OUT THE FIRST LIVING CELL IN UNICELLULAR ORGANISMS