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One hypothesis is that mitochondria are "swallowed" bacteria that were not digested but instead incorporated into the cell as a symbiont (helper). Mitochondria have a membrane similar to the cell membrane and their own genetic material similar to bacteria.

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Why are mitochondria found in both animal and plant cell?

because their last common ancestor (way back in precambrian) had mitochondria.


Which do chloroplasts and mitochondria have that other organelles lack?

There is a theory that chloroplast and mitochondria were independent organisms. Since they were, they would have their own DNA. And it is true that they do. It is interesting that you get your mitochondria from only your mother. There are many studies have used mtDNA to trace the evolution and migration of human species, including when the common ancestor to modern humans and Neanderthals lived.


Why are mollusks classified as animals?

Because they are - they eat and move and breathe and are made of animal cells (nucleus, mitochondria, no chloroplasts). They evolved from the common ancestor of animals. They are animals in everything.


Why do animal cells not have chloraplast?

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 two organelles are derived from symbiotic bacteria?

Chloroplasts and mitochondria. It is believed they were engulfed by the cells because of the dual membrane present on both. Both are believed to have originated from an endosymbiotic bacteria. Mitochondria's inner matrices contain DNA, and they have many features similar to those of bacteria. Chloroplasts are believed to have come from an endosymbiotic cyanobacteria.


What is a relative who was born long ago called?

An ancestor.


What types of cell are mitochondria found?

Eukaryotic cells have mitochondria (singular mitochondrion).


What is the evolutionary ancestor ancestor to the fungi?

Scientists have not identified an evolutionary ancestor to fungi.


What is the organelle where respiration occurs?

Cellular respiration occurs in the mitochondria.


What part of speech is ancestor?

Ancestor is a noun.


What do you call the people who will one day call you their ancestor?

You are always their ancestor. The people who call you their ancestor are your descendants.


Mitochondria in a restaurant?

Mitochondria in a restaurant