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gayaneshka [121]
3 years ago
15

Do all mutations result in negative effects? Why or why not?

Biology
1 answer:
Sauron [17]3 years ago
6 0

Answer:

No, mutations do not all result in negative effects. Sometimes they can be beneficial, as they are completely random. It is our general tendency to think of the word "mutation" in negative terms; however, do not get confused. Mutations are the root/ultimate source of genetic variation; they are one of the main factors that allow populations to evolve.

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mojhsa [17]

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Gravity: One of the <u>adaptations</u> of land plants are the deposits of <em>lignin and cellulose</em>. The cellular wall is composed of two phases:

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-  The matrix, constituted by pectic and hemicellulose substances.

Other substances can compose the cellular wall. One of them is the <em>lignin</em>, which is one of the most important components of the secondary wall, and after the cellulose, the most abundant polymer. During lignifications, the matrix contracts because of water loss, and the spaces left by the contraction are filled with lignin. Its function is to <em>give rigidity </em>to the cellular wall.

Competition: The meristem is composed of non-differentiated cells, with a thin wall, abundant cytoplasm, small vacuoles, and small endoplasmic reticule. Their size and shape vary: there are small isometric cells, and long, stretched, and fusiform cells. The <em>apical meristems </em>are in the roots and shoots. They compose the primary plant body. During growth the <em>meristem cells start to differentiate</em>, allowing the plant to get <em>bigger and higher</em>. In the competition for light, this is very important, especially when there are too many individuals together, like in a jungle or a forest. They need to <em>get</em> <em>higher</em> to <em>avoid being covered</em> by other plants and <em>to receive more radiation</em> for photosynthesis.  

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3 years ago
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