Evidence of the endosymbiotic theory was found in the nucleus and cytoplasm mitochondria and endoplasmic reticulum mitochondria and chloroplasts nucleus and chloroplasts

The endosymbiotic theory states that a host cell and a bacteria may easily become interdependent on one another through the cycle of evolution. Both mitochondria and chloroplasts

were such bacteria that became embedded in host animal and plant cells to produce energy for the cell itself.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.

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