Biology

Biology, 04.07.2019 06:00, Karlakins

The theory of endosymbiosis according to this theory explains how eukaryotic cells may have evolved from prokaryotic cells explain why mitochondria have their own dna separate from nuclear dna?

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Biology, 10.07.2019 14:00, lovebrain123

There is compelling evidence that today’s mitochondria and chloroplasts were once primitive bacterial cells. this evidence is described in the endosymbiotic theory. symbiosis occurs when two different species benefit from living and working together. when one organism actually lives inside the other it's called endosymbiosis. in the 1960's, a number of scientists had proposed that eukaryotic cells evolved when one bacterium (a prokaryote) engulfed another and the two began living together. over many generations, and through many smaller changes, the engulfed cell evolved into an organelle, like the mitochondrion. according to this idea, mitochondria look and act so much like bacteria because they once were bacteria. all but one statement below is further evidence in support of the endosymbiosis theory. that is a) nuclear dna is bundled up in linear strands. b) mitochondria have their own circular dna genome. c) bacterial dna is capable of directing protein synthesis and enzyme production. d) mitochondria are more closely related to bacterial cells than the eukaryotic cells in which they reside.

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Biology, 23.07.2019 08:30, issjzjjsmsm

Most of the life we see, including plants and animals are classified in the domain eukaryota. eukaryotic cells are more complex than prokaryotes, they contain organelles, and the dna is linear and found within the nucleus. the complex eukaryotic cell enabled a whole new era of life on earth, because these cells eventually evolved into multicellular organisms. but how did the eukaryotic cell itself evolve from a simple prokaryotic cell? evidence supports the idea that eukaryotic cells are actually the descendents of separate prokaryotic cells that joined together in a symbiotic union - endosymbiosis. what evidence supports the theory of endosymbiosis?

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Biology, 30.07.2019 09:30, michaeladkins1979

1, explain the endosymbiotic theory of the origin of eukaryotic cells in your own words. 2, compare at least two characteristics of mitochondria to prokaryotic cells and explain how this relates to the endosymbiotic theory. 3. describe an example of endosymbiosis that has been observed and documented.

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Biology, 17.10.2019 22:20, gabrielaaaa1323

The endosymbiosis theory states the orgin of the eukaryotic cells began when a. a mutation in prokaryotic cells led to the creation of new organelles b. prokaryotic cell consumed a smaller cell c. prokaryotic cells went extinct d. a prokaryotic cell needed more energy and evolved a mitochondria

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