Endosymbiosis refers to?

Question

a double membrane system


an organelle component of the endomembrane system.


aerobic respiration.


the process by which one organism comes to live in another.

Answer 1

This is a rather badly worded question. Endosymbiosis is the theory that mitochondria and chloroplasts were derived from free-living bacteria. Therefore it is the process by which one cell became incorporated within another. The second answer is incorrect as these are not technically components of the endomembranous system (and the other components were not derived this way). The last answer is correct, however it also describes endoparasitism (e.g. chlamydia bacteria living in body cells, tapeworms living in the intestine, etc.).

Smack your teacher for me please.

Answer 2

I agree with Jowpers, the question is worded badly. While the idea of endosymbiosis goes back to the 20's, in 1981, Lynn Margulis published the first edition of her book entitled Symbiosis in Cell Evolution in which she proposed that eukaryotic cells originated as communities of interacting entities that joined together in a specific order.
The mitochondria and chloroplasts can no longer be thought of as organisms, since they cannot survive outside the cell, so answer D is not really right

Answer 3

D - one organism coming to live in another.

A common theory says that many of the organelles used to be free-living organisms, but that now they live inside cells as organelles.