Chapter 25.1, Problem 3CC

Summary Introduction

To explain:

The origin of the eukaryotic photosynthesis if the photosynthetic organelle of a protist is discovered to be most closely related to a different cyanobacterium than the one that gave rise to plastids.

Introduction:

Endosymbiosis is a hypothesis that explains the evolution of the eukaryotic cells like mitochondria in animal and fungi and chloroplast in plants from the prokaryotes. The mitochondria and chloroplast show similarities to the bacterial cells. The eukaryotes are called as “combination” organisms because their DNA shows that some of their cellular character and genes are derived from archaebacteria and some other bacteria. This occurred due to a symbiotic relationship process known as endosymbiosis. In this association, one organism lives inside the other.