EVERYDAY SCIENCE

Detailed explanation-1: -Plant and animal cells are eukaryotic, meaning that they have nuclei. Eukaryotic cells are found in plants, animals, fungi, and protists. They generally have a nucleus-an organelle surrounded by a membrane called the nuclear envelope-where DNA is stored.

Detailed explanation-2: -As with all eukaryotic cells, protists contain membrane-bound nuclei and endomembrane systems, as well as numerous organelles.

Detailed explanation-3: -The nucleus is an organelle found in most eukaryotic cells, the exception being red blood cells. In animal cells it is both the largest and stiffest organelle and is easily identifiable by light microscopy. The average mammalian nucleus has a diameter of  6µm and occupies about 10% of the total cell volume.

Detailed explanation-4: -Both plant and animal cells are eukaryotic, so they contain membrane-bound organelles like the nucleus and mitochondria.

Detailed explanation-5: -Protists have a nucleus because they are eukaryotic organisms. Usually, protist cells contain a single nucleus (they are mononucleate). However, many protists are multinucleated, meaning they contain many nuclei.