Answer:
A
Explanation:
A because the introns are edited then linked together by nucleotides
<span>an organic compound made by replacing the hydrogen of an acid by an alkyl or other organic group. Many naturally occurring fats and essential oils are esters of fatty acids. SOURCE: GOOGLE
I sourced it so please dont report</span>
Light/Sun light. When planning on growing plants in your classroom the spot you're going to put them should be considered.
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Explanation:
Lichen is the best species to determine the pollution of air. They are highly sensitive to pollution and will barely be found growing on trees or rock in regions where the air has been polluted.
Worms are also a good indicators of pollution in the soil. Polluted soils will have very few to no worms.
Small invertebrates like the Caddisfly are used to determine pollution of water. They are very sensitive to water pollution and cannot be found in polluted waters. In addition toads and frogs are rare in polluted waters and air.
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For more on bioindicators check out;
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When earth worms bring fine rocks to particles they do it in mechanical weathering
