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Chloroplasts (as well as Mitochondria) are endosymbionts. This means that they are cells, living within another cell. Historically, eukaryotic cells had no mitochondria or chloroplasts (and mitochondria and chloroplasts existed by themselves outside of cells). The current hypothesis is that a cell tried to engulf a mitochondria (by phagocytosis) but failed in digesting it. Over time, some of the mitochondrial DNA (mtDNA) became part of the host cell's genome. This cell is a common ancestor to both plants and animals, which is why both have mitochondria. A cell with mitochondria then did the same thing with chloroplasts, absorbing one, and taking some of its ctDNA etc.
Because not all cells that had mitochondria absorbed chloroplasts there were cells with mitochondria only, and cells with mitochondria and chloroplasts.
The ones with chloroplasts evolved to become plant cells, and those without evolved to become animal cells.
What else can I help you with?
Does an animal cell have chloraplast?
No, animal cells do not have chloroplasts, only plant cells do.
What two things do plant cells have that animal cells don't?
Plant cells have cell walls made of cellulose which provide structure and support, while animal cells do not have cell walls. Plant cells also have chloroplasts which are responsible for photosynthesis, while animal cells do not have chloroplasts.
What does chloraplast do?
PHOTOSYNTHESIS
Is a chloraplast an organelle?
yes
What structures are found in a plant cells that are not found in animal cell?
chlorophyll
Where is chloraplast found?
mainly in the leaves
What chemicals does the chloraplast contain?
chlorophyll
Does potatoes have chloraplast?
um...YES!I think!
Why are cheek cells animal cells?
All the cells collected from an animal of which the human body is are animal.
How are animal cells from plant cells?
Animal cells are different from plant cells in that the cell wall of animal cells is not made up of cellulose.
Is centrioles in plant or animal cells?
Animal cells, not plant cells.
What are two differences cells and animal cells?
plant cell shave a cell wall - animal cells do not plants cells have chlorophyll - animal cells do not
