Question

how does the endosymbiosis theory describe the evolution of eukaryotes in regard to the mitochondria and chloroplasts? they separated from the host cell and now reproduce independently. they became more dependent on each other and fused into one organism. the mitochondria and chloroplast evolved into two separate organisms.

Explanation:

The endosymbiosis theory states that mitochondria and chloroplasts were once free - living prokaryotes. They were engulfed by a larger host cell. Over time, they became more dependent on each other. The host cell provided a protected environment, and the engulfed prokaryotes (which would become mitochondria and chloroplasts) provided energy - related functions (mitochondria for cellular respiration, chloroplasts for photosynthesis in plants). Eventually, they fused into one organism (the eukaryote), with the mitochondria and chloroplasts becoming organelles within the eukaryotic cell.

Answer:

They became more dependent on each other and fused into one organism.