Question

Compare three different ways that eukaryotic cells may have evolved.

Short answer

Some theories suggest that the nucleus was the first organelle to develop, while others believe that the nucleus was the first to form. Others believe that eukaryotes were the first to form and that prokaryotes evolved from them.

Step-by-step solution

Introduction

A membrane-bound nucleus and other cell organelles are found in eukaryotic cells. The chromatin material may be found inside the membrane-bound nucleus, and the organelles have distinct activities. Eukarya is the realm that contains all eukaryotic organisms.

Explanation

Endosymbiosis of tiny aerobic and photosynthetic cyanobacteria by bigger primordial microbes, followed by the formation of the nucleus, is thought to be the origin of organelles like mitochondria and chloroplast.

According to some theories, the nucleus formed first in primitive microorganisms, followed by the internalization of organelles like mitochondria and chloroplasts.

Another school of thought contends that eukaryotes evolved first, and prokaryotes are generated by the loss of some genes and characteristics as eukaryotes adapt to changing environmental conditions.

Conclusion

Some hypotheses claim that the nucleus was the first to form, while others claim that cell organelles were the first to develop. Others think that eukaryotes were the first to develop and that prokaryotes emerged from eukaryotes.