Answer:
If during meiosis the efficiency to form tetrads is reduced or absent -due to a mutation- this defect would most likely affect the ability to align homologous chromosome at the metaphase plate.
Explanation:
Options for this question are:
<em>a) Breakdown the nuclear membrane
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<em>b) Duplicate centrosomes
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<em>c) Assemble spindle microtubules
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<em>d) Establish spindle poles
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<em>e) Align homologous chromosome at the metaphase plate</em>
During the zigoteno of the prophase I (meiosis) the bivalent chromosomes are formed, product of the pairing of genes. Each of the chromosomes of a pair is constituted by two sister chromatids, resulting in a structure called tetrad, due to the existence of four chromatids.
If in the next phase, metaphase, tetrad (four chromatides) has not formed, alignment in the equator and spindle synthesis is not possible, so the metaphase plate is not formed and the respective chromosomes cannot migrate to cell poles.
Learn more:
Metaphase I brainly.com/question/814000
<span>Stem cells are like the stem of a plant cell because they both can help replace or fix something
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Answer:
Basically land pollution is caused due to urbanization, mining, industrialization, landfill and improper waste disposal of agricultural chemicals . Major chemicals responsible are pesticides, lead, heavy metals, petroleum hydrocarbon etc.
Explanation:
Mining:
This creates large holes in the ground which in a long run causes soil erosion. Mining also removes the topsoil making teh soil barren land.It also releases harmful chemicals that contaminates the air and soil.
Industrialization:
The waste from the industry contains heavy metals in it. Which pollutes the urban soil as well as the cropland. Among all lead is most toxic that causes major part of land pollution.Also the chemicals makes the land infertile for making cultivation in it.
Answer:
Glutamic acid or Glutamate
Explanation:
This question is describing the process of TRANSLATION, which is the process by which protein is synthesized from a mRNA template. In the process of translation, a molecule called transfer RNA (tRNA) reads mRNA codons and carries its corresponding amino acid to the growing polypeptide chain.
According to this question, strand of messenger RNA is undergoing translation in the ribosome. However, the next exposed codon of this messenger RNA has the code GAA. A tRNA carrying an amino acid that corresponds to the codon GAA will attach to it. This amino acid is GLUTAMIC ACID.
N.B: codon GAA encodes amino acid GLUTAMIC ACID