GEOLOGY

Detailed explanation-1: -These two types have been termed prokaryotes (cells with naked DNA without a membrane envelope) and eukaryotes (cells with a membrane-bounded nucleus).

Detailed explanation-2: -There are two basic types of cells: prokaryotic cells, which lack a nucleus, and eukaryotic cells, which contain a nucleus. Prokaryotic cells are found in single-celled organisms, such as bacteria. Eukaryotic cells are found mainly in multicellular organisms.

Detailed explanation-3: -Prokaryotic cells comprise bacteria and archaea. Their genetic material isn’t stored within a membrane-bound nucleus.

Detailed explanation-4: -Cells fall into one of two broad categories: prokaryotic and eukaryotic. The predominantly single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes (pro-= before; -karyon-= nucleus). Animal cells, plant cells, fungi, and protists are eukaryotes (eu-= true).

Detailed explanation-5: -Eukaryotic cells may be classified into two groups based on the number of cells that make an individual organism: (1) unicellular eukaryotic cells and (2) multicellular eukaryotic cells. Unicellular eukaryotes include the protists.