Answer:
The evidence suggests that these chloroplast organelles were also once free-living bacteria.
Explanation:
The endosymbiotic event that generated mitochondria must have happened early in the history of eukaryotes, because all eukaryotes have them.
:)
From tiny blood cells/vessels!
Hope this helps!
There are 4 thing that need to happen for natural selection to occur:
1) reproduction
2)heredity
3)variation in fitness or organisms
4)variation in individual characters of the population.
Those things are stored inside your body. Hope this helps! ^-^
