<u>Answer:</u>
<em>Repeated use of chemical fertilizers has several adverse impacts.
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<u>Explanation:</u>
<em>Chemical fertilizers are used to increase crop yield and raise agricultural productivity.</em> But a land loses its fertility over the years due to repeated fertilizer use.
<em>Excess use of fertiliser makes the soil acidicby reducing the organic content of the soil. </em>
When the amount of chemical fertilizers containing nitrogen is applied is beyond the amount that can be absorbed by the plants, it results in the release of greenhouse gases into the atmosphere.
<em>When the fertilizers are washed into water bodies their nutrient content increases heavily and this depletes the oxygen in water.
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Answer:
<u>D. Mendel's law of independent assortment is being violated</u>.
Explanation:
The alleles of two (or more) different genes get sorted into gametes independently of one another or the allele a gamete receives for one gene does not influence the allele received for another gene, This is <u>Mendel's law of independent assortment. </u>
From the question, it is clear that phenotypes of black eyes is interdependent to green skin and phenotype of orange eyes is interdependent to white skin so it is violation independent assortment law.
All the four phenotypes are expressed fully in offspring so it is not violating law of segregation and these are not co-dominant.
Explanation:While a constant supply of freshwater happens by itself in natural streams, an aquarium is by definition, a closed system. So here, man has to help out in order to provide new..
Answer:
(A) The T was originally a cytosine, which was deaminated to a T
Explanation:
Adenine and guanine are found in both DNA and RNA.
Cytosine is found in both DNA and RNA.
Thymine is normally found in DNA.
In a CpG site (5'—C—phosphate—G—3') , that is, Cytosine and Guanine separated by only one phosphate group; phosphate links any two nucleosides together in DNA.
In a G:T base pair in DNA, Adenine pair with Thymine and Guanine pair with Cytosine.
Here in the question, The G:T base pair in DNA suggests that the T was originally a cytosine, which was deaminated to a T.
How methylation of CpG sites followed by spontaneous deamination leads to a lack of CpG sites in methylated DNA.
A Cytosine base followed immediately by a Guanine base (a CpG) is rare in vertebrate DNA because the Cytosine in such an arrangement tend to be methylated. This methylation helps to distinguish the newly synthesized DNA strand from the parent strand, which aids in the final stages of DNA proofreading after duplication. However, over time methylated cytosines tend to turn into Thymine because of spontaneous deamination.
Answer:
Iodised salt (also spelled iodized salt) is table salt mixed with a minute amount of various salts of the elementiodine. The ingestion of iodineprevents iodine deficiency. Worldwide,iodine deficiency affects about two billion people and is the leading preventable cause of intellectual and developmental disabilities. Iodine is needed by our thyroid gland to help regulate the proper development and metabolism of both brain and skeleton of our body.
<em>Hope this helps</em>
<em>-Amelia The Unknown</em>
