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3 years ago

How is the oxygen cycle disturbed by deforestation?

2 answers:

7 0

Deforestation is the removal of trees and plant life from a given area. with the absence of plant life comes the absence of photo-synthases. This causes a drop in the production of oxygen.

saw5 [17]3 years ago

6 0

Answer: The word deforestation can be defined as the cutting of trees in huge amounts. The oxygen cycle gets disturbed by the cutting of trees.

Explanation:

The trees absorbs the carbon dioxide from the atmosphere and releases oxygen into the atmosphere. This is how both the carbon dioxide and oxygen level are maintained in the environment.

If the number of trees will be less then more amount of carbon dioxide will be found in the environment and oxygen will be less.

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How many different elements are in O2?

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Explanation:

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Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I

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Answer:

Sister chromatids are identical forms of chromatids of a chromosomes. They are mostly formed by semi-conservative replication of DNA molecule of a single chromosome.Thus they are like 'photocopies' of original parent chromosomes; joined together at the Centromere.

They are exactly similar in all ramification; with the same gene and allele compositions..

However; slight differences arise between the two identical sisters due to mutation from errors at replication;and also in the length of telomere repeats.

Non-sister chromatids are dissimilar forms of chromatids of a chromosomes formed when each half of a chromosome at fertilisation from separate haploid sex-cells, of each parent. fused.They contain different genetic composition;because they are not on the same homologous chromosomes.Therefore crossing -over ensure variation.

However, they are genetically similar in composition; if they are contained in homologous chromosomes. This is because Synapsis of bivalent of these chromosomes allow genetic material to be shared by chromosomal crossing-over between the non-sister chromatids on the chromosomes ; therefore identical genetic characteristics are shared .

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3 years ago

A single gene mutation results from

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