Question

Why did plants and other photosynthetic Eukaryotes not just stick and evolve their orig
inal photosynthetic pigment, and rather use the "strange", imported Chlorophyll instead?
Hint; it is not just the chlorophyll as pigment, but "who" gave it to the eukaryotes, and in what system it was used in that group of organisms.
95 words

Answer 1

Eukaryotic plant cells aquired chloroplasts because of the symbiotic relation with photosynthetic bacteria. Photosynthesis in the plant cells evolved due to the endosymbiosis of the photosynthetic bacteria. Without these bacteria in plant cells, they would not have the ability to photosynthesize. This can be hypothesized because the chloroplasts and the bacteria show number of similarities. The bacteria have chromatophores in them which have the chlorophyll that ca photosynthesize. When the endosymbiotic relation is established, the bacteria became a permanent member of the plant cells because of the benefit both of them are acquiring. The chromatophores contain the photosynthetic pigments in bacteria. Such bacteria may have developed symbiotic relation ot evolve in to chloroplast.

Because they have developed chloroplasts this way, eukaryotic cells did not have to develop their own photosynthetic pigments on their own.