EVERYDAY SCIENCE

SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement below correctly explains and gives the importance of the endosymbiotic theory?
A
The endosymbiotic theory states that the inner and outer membrane of the endoplasmic reticulum indicates these were once free living organisms which were taken into an early cell via endocytosis. The theory was further supported by the presence of prokaryotic ribosomes and replication of the endoplasmic reticulum via binary fission.
B
The endosymbiotic theory states that the inner and outer membrane of the mitochondria indicates these were once free living organisms which were taken into an early cell via endocytosis. The theory was further supported by the presence of prokaryotic ribosomes and replication of mitochondria via binary fission.
C
The endosymbiotic theory states that through endocytosis, early prokaryotic cells were able to bring in additional nutrients. These additional nutrients provided important energy that drove evolution of these prokaryotic cells into the eukaryotic cells seen today in more advanced organisms.
D
The endosymbiotic theory states that through endocytosis, early prokaryotic cells were able to bring in early energy rich eukaryotic cells. The energy provided drove evolution of these prokaryotic cells into the eukaryotic cells seen today in more advanced organisms.
Explanation: 

Detailed explanation-1: -Which statement below correctly explains and gives the importance of the endosymbiotic theory? The endosymbiotic theory states that the inner and outer membrane of the endoplasmic reticulum indicates these were once free living organisms which were taken into an early cell via endocytosis.

Detailed explanation-2: -The statements that are TRUE regarding the endosymbiosis theory are the endosymbiosis theory tells us how the eukaryotic cell first arose and that strong evidence in support of the theory is that the DNA of chloroplasts and mitochondria is very closely related to DNA sequences from 2 different groups of bacteria.

Detailed explanation-3: -Introduction. Without endosymbiosis, life on Earth would be vastly different. Endosymbiosis has been key to the diversification of eukaryotes as a whole, all plants, large clades of insects and other invertebrates, and diverse protozoan groups. Many life forms and lifestyles would not exist without it.

Detailed explanation-4: -"The exterior structure similar to bacterial cell walls” IS NOT an evidence in favour of the endosymbiotic theory. Both mitochondria and chloroplasts are double membrane bound.

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