Yes
yes
it is the nuclei
chloroplast
The nuclei is one organelle that is important to the muscle system. This is because the nuclei helps the muscle system develop.
"In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells." - Wikipedia article: "Nucleus (cell)"So yes, a nucleus is an organelle. Although my textbook doesn't really seem to consider the nucleus as an organelle, it treats it like its something separate... but it makes more sense that its considered an organelle.
Mammalian cells have nuclei. But red blood cells lack
Cell nuclei are membranous organelles. Their membranes are similar to regular cellular membranes.
Chloroplasts are the main organelles used, along with ribosomes, nuclei, and the endoplasmic reticulum.
Yes. The term organelle really is a rather vague term that denotes any specialized subunit within a cell and nuclei are definitely specialized subunits designed for enclosing and protecting the cell's complement of DNA.
A nuclear pore is not a cell. It is not even an organelle, only a characteristic/part of the nucleus. I think you mean are cells with nuclei prokaryotic. No, possessing nuclei is a characteristic of eukaryotic cells. If you need more information, see the related link.
In most cases the nucleus is the organelle that takes up the most volume in an animal cell. In the nuclei is where DNA of an animal can be found. This makes the nucleus the most important organelle as well.
ferns
There are 20,000 species of ferns. Ferns are vascular.