Maternal and fetal tissues form two units that are closely bound together at the placental level. Quiz. The fetal part of the placenta is made up of the chorionic plate with its placental villi, the cytotrophoblast layer and the intervillous spaces.
1 , which performs the function of photosynthesis. 2  Chloroplasts are double-membrane-bound, like mitochondria. 3  Also like mitochondria, their inner membrane is very complicated. 4  In fact, it's formed into many thylakoid structures which perform the same function performed by the thylakoids in prokaryotic cells.
Location. Prokaryotes do not have nucleus and other membrane-bound organelles, like mitochondria, endoplasmic reticulum, and golgi bodies. The prokaryotic DNA is present as a DNA-protein complex called nucleoid. The replication occurs in the cytoplasm of the cell. In case of eukaryotes, the organisms that contain a membrane-bound nucleus, the DNA is sequestered inside the nucleus.