If organisms A, B, and C belong to the same class but to different orders and if organisms C, D, and E belong to the same order but to different families, which of the following pairs of organisms would be expected to show the greatest degree of structural homology?1. A and D2. B and D3. B and C4. D and E

The correct answer is 4. D and E

Explanation:

Organisms are divided into seven major levels of classification and these are Kingdom, phylum, class, order, family, genus, and species. The highest level here is the kingdom and the smallest level is species.

If we move from kingdom to species the structural homology increase and when we move from species to kingdom structural homology and relatedness decreases.

Therefore as class is higher domain than order so the organism in order will show more degree of structural homology with each other than class therefore the correct answer is 4.

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c. is the correct answer