LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why was the origin of the eukaryotic cell a milestone in the evolution of life?
A
It led to the evolution of anaerobic autotrophs.
B
It led to organisms that were heterotrophic.
C
It led to more complex cells and multicellular organisms.
D
It led to organisms that were capable of using sunlight for energy.
Explanation: 

Detailed explanation-1: -Those cells were quite simple but, at some point over the course of evolution, they gave way to a more complex cellular lineage: the eukaryotes, or cells with a nucleus. Eukaryotic cells have given rise to the most complex life forms existing on earth, including multicellular organisms such as animals, plants or fungi.

Detailed explanation-2: -Eukaryotic have a more complex cell structure due to compartmentalisation of organelles. So, they need a more complex process like mitosis which also divides the organelles and cytoplasm equally among the daughter cells.

Detailed explanation-3: -The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes-endosymbiosis-is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.

Detailed explanation-4: -Eukaryotic cells may have evolved from a symbiotic relationship between specialized prokaryotic cells. There are many reasons why complex life may have taken so long to evolve, including the rate of evolutionary processes, the lack of an evolutionary advantage, unfavorable environmental conditions, or mass extinctions.

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