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kvv77 [185]
3 years ago
9

Who was the first scientist to discover cells with the use of a homemade microscope? Carolus Linnaeus Robert Hook Rudolf Virchow

Theodor Schwann
Biology
2 answers:
Tamiku [17]3 years ago
5 0
Robert hook             ..........
Vedmedyk [2.9K]3 years ago
5 0

Answer: Robert Hook

Robert Hook was the first scientist to discover cells with the use of homemade microscope. He discovered cells for the first time in 1665. He took thin slice of cork from tree bark and observed it under his homemade microscope. He observed that cork was made of tiny boxes he named these boxes as cells.  

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Meiosis I
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1.2 Meiosis II
The second division: separates sister chromatids (these chromatids may not be identical due to crossing over in prophase I)

     Prophase II: Chromosomes condense, nuclear membrane dissolves, centrosomes move to opposite poles (perpendicular to before)
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2. The differences:
Mitosis:
- has 1 division per cycle
- one cell produces 2 new cells
- the genetic information in the mother-cell and the daughter-cells are the same. ( the number of chromosomes is also the same)
- it occurs in somatic cells
Meiosis:
- two divisions per cycle
- one cell when divides produces 4 new cells
- the new cells have different genetic information. mixes the genetic material from the parent cells
- the number of chromosomes of the daughter cells is half of the mother's.

3. Prokaryotic organisms don't divide through mitosis, they use a different process called binary fission. Only eukaryotic organisms, or those whose cells have a defined nuclei, undergo mitosis. Bacteria, for example, are prokaryotic organisms that use binary fission.

4.
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5. There are a lot of different theories about that, but it's mostly believed that meiosis must evolve before sexual reproduction. That's because The cell replicates their information first and then divides. Plus the cell does that even though it didn't recombine DNA with another organism (sexual reproduction).

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