What are the main sources of carbon dioxide in the atmosphere?

1 answer:

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There are both natural and human sources of carbon dioxide emissions. Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil

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If a blue light shines on a green dress what colour would the dress be?

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Which of the following statements about amino acids is incorrect?A turn or kink in a protein is more likely to be induced by a p

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The correct answer is The bridge between cystein which connects parts of a protein is stable but non covalent interaction.

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Disulfide bond link the sulfhydryl group of two adjacent cystein residues in a protein structure.

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the mitochondria, where cells energy is made, is often considered to be the cells control system(t or f)

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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 .

Explanation:

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