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answer the question below from science class 9 biology:
Q.what would happen if plants would discard off all the dead cells of their body
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Answers
Cells that are not needed may never have had a function. In other cases, they may have lost their function, or they may have competed and lost out to other cells. In some organisms, especially lower species, there are cells that die off very soon after they are born. There is no clear reason why they ever existed. These cells are probably evolutionary relics that were useful in the past, but no longer serve any valuable function. For an example of cells that lose their function, consider the cells in the tail of the tadpole, which become superfluous when the animal develops into a frog.
"An instance of cellular competition occurs in the developing human brain. The brain makes many more neurons than we need, probably because the body does not 'know' how many neurons will suffice and because wiring together an intricate structure such as the brain is not easy. For example, many neurons will fail to reach their targets--their axons may take a wrong turn or may terminate prematurely. These strays that fail to establish a proper connection will die. Death here functions as a built-in error-correcting mechanism.
"More generally, building a complex organism like a human being is like creating an intricate sculpture. Cell division forms the clay, whereas cell death sculpts the clay into the desired form. Consider human hands, which start out as paddlelike structures. Fingers develop in the paddles, but then the cells in the tissue between the fingers must die for a proper hand to form...