The genome of modern chloroplasts is roughly 50 \% the size of the genome of the cyanobacterium from which it is thought to have been derived. In comparison, the genome of P . chromatophora's chromatophore is only slightly reduced relative to the size of the genome of the cyanobacterium from which it is thought to have been derived. What is a valid hypothesis that can be drawn from this comparison? (A) Lytic phage infections have targeted the chloroplast genome more often than the P . chromatophora genome. (B) P . chromatophord's chromatophore is the result of an evolutionarily recent endosymbiosis. (C) The genome of the chloroplast ancestor contained many more introns that could be lost without harm compared to the chromatophore's genome. (D) The genome of the cyanobacteria was smaller than the genome of P . chromatophora.

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23-08-2022
Biology

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The genome of modern chloroplasts is roughly 50 \% the size of the genome of the cyanobacterium from which it is thought to have been derived. In comparison, the genome of P . chromatophora's chromatophore is only slightly reduced relative to the size of the genome of the cyanobacterium from which it is thought to have been derived. What is a valid hypothesis that can be drawn from this comparison? (A) Lytic phage infections have targeted the chloroplast genome more often than the P . chromatophora genome. (B) P . chromatophord's chromatophore is the result of an evolutionarily recent endosymbiosis. (C) The genome of the chloroplast ancestor contained many more introns that could be lost without harm compared to the chromatophore's genome. (D) The genome of the cyanobacteria was smaller than the genome of P . chromatophora.

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Tutorconsortium365 Tutorconsortium365 · Answer 1 · 2022-08-29T23:42:11-04:00

P . chromatophord's chromatophore is the result of an evolutionarily recent endosymbiosis.

What is chromatophore ?

The integument and internal organs include pigment-containing cells called chromatophores. Depending on the circumstance, their role is to adapt the body's hue to its environment (e.g., protection, mating behavior, antagonistic displays).

The term "disseminated state" refers to the state of the pigment granules when they are dispersed along the chromatophore extensions. The granules are most noticeable in this form, which also gives the chromatophore its distinctive hue. The granules are concentrated and less noticeable when they are removed from the chromatophore extensions.

Crustacean eyestalk ablation causes a significant darkening or lightening of the body color in addition to accelerating the molt.

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