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Which of the following properties of chloroplasts and mitochondria does not provide support for the endosymbiont theory that present-day eukaryotic cells are descendants of a successful symbiotic relationship between a host cell and an engulfed prokaryote? They have a double membrane that resembles that of some ancient prokaryotic cells. They have their own DNA and also replicate in a manner similar to some bacteria cells. Their inner membranes contain the same enzymes as prokaryotic plasma membranes. They are able to produce ATP molecules to help power metabolic processes

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The hypothesized process by which prokaryotes gave rise to the first eukaryotic cells is known as endosymbiosis, and certainly ranks among the most important evolutionary events. Endosymbiotic theory, that attempts to explain the origins of eukaryotic cell organelles such as mitochondria in animals and fungi and chloroplasts in plants was greatly advanced by the seminal work of biologist Lynn Margulis in the 1960s. Mitochondria are one of the many different types of organelles in the cells of all eukaryotes. In general, they are considered to have originated from proteobacteria (likely Rickettsiales) through endosymbiosis. Chloroplasts are one of the many different types of organelles in the plant cell. In general, they are considered to have originated from cyanobacteria through endosymbiosis. Endosymbiosis has gained ever more acceptance in the last half century, especially with the relatively recent advent of sequencing technologies. There are many variants to the theory, regarding what organism(s) engulfed what other organism(s), as well as how many times and when it occurred across geological time. The biology is messy, and there are many competing theories, so here we tend to converge them in a unified conceptualization [for more detailed treatment, visit the "Origins of the Eukara" pages at Palaeos].
sorry it's very long.
i'm confused ): ....

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well............ IDK what to say. Okay I think I'll give it my best shot! I think it will be B!
BTW, I like your profile pic, what is it?
my profile pic is from facebook. night club game. i made a character and then i took a headshoot pic. you probably can't get the raindeer head piece
Let me know if you need help. i'll be very glad. :D
wait i have another question The evolution from vesicles to true cells was best facilitated by the development of a membrane separating the cell from its environment organic molecules, such as carbohydrates and lipids self-replicating molecules, such as RNA and DNA inorganic molecules, such as nitrogen and oxygen
I think i'll have to say A, because it mainly uses a membrane separating the cell from its enviorment. B could also be a good answer because it also uses organic compounds such as lipids and carbs in this evolution. Hope that helps.
okay thanks. p.s. i like your picture too
thanks. :D
your welcome :D
haha :D what do you do for a living?
well, I like to study, play games, and have fun outdoors. I mainly like to write stories.
cool! how often are you on here andi just came across a question and could you not make it so long! Explain the roles that hot clay and vesicles may have played in the origin of life on Earth and describe evidence that supports this hypothesis.
The hypotheses about the origins of life may be divided into several categories. Most approaches investigate how self-replicating molecules or their components came into existence. For example, the Miller–Urey experiment and similar experiments demonstrated that most amino acids, often called "the building blocks of life", were shown to be racemically synthesized in conditions similar to those of the early Earth. Several mechanisms have been investigated, including lighting and radiation. Other approaches ("metabolism first" hypotheses) focus on understanding how catalysis in chemical systems in the early Earth might have provided the precursor molecules necessary for self-replication.
im sorry its long.
ill live i'm gona try my best to shorten it and add in what i can remeber. :)
okay! P.S= can I become friends with you on Facebook?
i don't really ever use it but sure! i guess..
i gotts head out.. i need to go. buy
bye oops
Never mind.
never mind what?
what happned?

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