LIFE SCIENCE

Detailed explanation-1: -Eukaryotic cells have a nucleus enclosed within the nuclear membrane and form large and complex organisms. Protozoa, fungi, plants, and animals all have eukaryotic cells.

Detailed explanation-2: -Eukaryotes such as fungi, protozoa, plants, and animals, and thus we humans, have cells with complex structure (Figure 1) with internal membranes and membrane-bounded organelles. These include the chromosome-containing nucleus surrounded by a nuclear envelope consisting of two membranes.

Detailed explanation-3: -For instance, all plants and animals are made of eukaryotic cells-sometimes even trillions of them (Figure 4). A eukaryotic cell (left) has membrane-enclosed DNA, which forms a structure called the nucleus (located at center of the eukaryotic cell; note the purple DNA enclosed in the pink nucleus).

Detailed explanation-4: -Summary. The nucleus is a membrane-enclosed organelle, found in most eukaryotic cells, which stores the genetic material (DNA). The nucleus is surrounded by a double lipid bilayer, the nuclear envelope, which is embedded with nuclear pores.