A process of copying DNA sequence into messenger RNA (mRNA) is called transcription. RNA polymerase is an enzyme involved in this process. First, it binds to DNA and separates its two strands. Then, it adds ribonucleotides to the complementary nucleotides on DNA strand and, thus, it makes mRNA from DNA. Afte RNA polymerase de-attaches from DNA strand, transcription of mRNA stops and mRNA is now free.
I’d like to believe the answer is C. Inbreeding tends to increase the proportion of homozygous individuals in a population.
Answer:
D) All of the above are true.
Explanation:
Wetlands are the regions of land which are covered by water. The water can be fresh water, Saltish water or between these two. Low-lying areas of rivers or oceans, ponds, lakes and marshes, all fall under wetlands.
- Wetlands are extremely important for the life on earth because of immense number of services they provide to humans, wildlife and fish. They are more productive region than coral reefs and rain forests.
- They have an important role in protecting the shores from the strong action of waves that can cause floods. They also help in trapping sediments and thus lowering the losses due to soil erosion. This makes option A true.
- They provide habitat and food source to wide array of organisms such as fish and wildlife therefore option B is also true.
- They also help in the controlling of pollution because they clean or filter sediment from runoff water which ultimately helps in preventing mud clogging in water reservoirs such as lakes. Therefore, they have a cleansing or filtration action and this makes option C true.
Hence, D is the best option.
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