2007-10-03 14:24:32 · 6 answers · asked by o0lilazndemon0o 3 in Science & Mathematics ➔ Biology
Nucleus
Mitochondria
Chloroplasts
2007-10-05 03:03:48 · answer #1 · answered by big tom cat 3 · 4⤊ 0⤋
The two organelles bounded by two membranes are the mitochondrion and the chloroplast.Both of them have their own outer and inner membranes which function for protection. According to the evidences of the endosymbiotic theory,mitochondrion and chloroplast existed before as a unicellular prokaryote.In addition,the both of them had already built up their own membranes,contained their own protein synthesizing machineries,and had their own chromosomes which were circular in form unlike to the chromosomes of the eukaryotes which are linear and in a specialized helical structure.
2007-10-03 15:47:08 · answer #2 · answered by funky 1 · 1⤊ 3⤋
the nucleus and mitochondria has a double membrane but cholorplasts DO NOT. chloroplasts are the only organelle that has a triple membrane system, the external and internal membranes and the granum (the pancake-like stacks of thylakoids).
2007-10-03 15:50:41 · answer #3 · answered by BernaBerna 3 · 3⤊ 2⤋
Mitochondria
2007-10-03 14:32:44 · answer #4 · answered by hobo 7 · 0⤊ 2⤋
Mitochondria and chloroplasts have two membranes.
2007-10-03 14:29:21 · answer #5 · answered by ecolink 7 · 0⤊ 3⤋
The nucleus.
2007-10-03 14:43:16 · answer #6 · answered by anonymous 3 · 0⤊ 2⤋