Question

8. "Cell wall is a unique structure of plant cells'. Who concluded this
(a) Schleiden
(b) Schwann
(c) Both (a) and (b)
(d) None of these​

Answer 1

Answer:

Plant Cell - Definition, Parts and Functions | Biology Dictionary The cell wall is a tough layer found on the outside of the plant cell that gives it strength and also maintains high turgidity. In plants, the cell wall contains mainly cellulose, along with other molecules like hemicellulose, pectin, and lignins.

Discovery of the Cell and Mitosis In 1838, Matthias Schleiden, a German botanist, concluded that all plant tissues are composed of cells and that an embryonic plant arose from a single cell. He declared that the cell is the basic building block of all plant matter.

Answer 2

Answer:

Theodore Schwann concluded that "Cell wall is a unique structure of plant cells".

Explanation:

• According to Theodore Schwann (1839), a British zoologist who investigated several animal cell types, cells have a thin outer layer that is now referred to as the "plasma membrane."
• Based on his research on plant tissues, he came to the further conclusion that the presence of a cell wall is a distinctive feature of plant cells.
• On the basis of this, Schwann put up the theory that cells and cell-derived materials make up the bodies of both plants and animals.
• His contributions to biology include the creation of the cell theory, the identification of Schwann cells in the periphery of the nervous system, the discovery and analysis of pepsin, the identification of the organic nature of yeast, and the creation of the term metabolism.

Option (b) is correct.

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