Question

which of the following is not evidence supporting the hypothesis of the endosymbiotic evolution of mitochondria and chloroplasts? group of answer choices mitochondria and chloroplasts are similar in size to prokaryotes the membrane systems of eukaryotes are thought to be derived from the prokaryotic plasma membrane photosynthetic eukaryotes must have evolved prior to the oxygen revolution mitochondria and chloroplasts are self-replicating and have their own genetic material the ribosomal rna of mitochondria and chloroplasts are more similar to those of prokaryotes than they are to the nuclear genes of the cells in which these organelles occur

Answer 1

The endosymbiotic idea and the existence of non-coding DNA are not supported by the chromosome similarities of the organelles (mitochondria and chloroplast).

According to the endosymbiotic theory, mitochondria and chloroplasts were once separate bacteria that were engulfed by eukaryotic cells, forming a beneficial symbiotic relationship. Over time, the mitochondria and chloroplasts lost their cell walls because they were not protected by walls, according to the theory.

Which three facts support the endosymbiotic theory?

Proof of endosymbiosis

Looking at a few crucial characteristics reveals evidence that these organelles have extracellular origins: Membranes (double membrane bonded) (double membrane bound) Antibiotics (susceptibility) (susceptibility) Division (mode of replication) (mode of replication)

Proof of endosymbiosis

Membranes – Just like prokaryotic cells, mitochondria have their own cell membranes.

Each mitochondrion possesses a circular DNA genome that is similar to a bacterial genome but considerably smaller.

Reproduction: By pinching themselves in half, mitochondria reproduce, a method also adopted by bacteria.

The endosymbiotic idea is supported by the finding of independent DNA (from the host) in mitochondria and chloroplasts.

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