Question

How does domain eukarya differ from domain bacteria and domain archaea?

Answer 1

Hint: All life, depending on the type of cell of the organism, can be divided into three domains:
Bacteria: no nucleus is present in cells.
Archaea: There is no nucleus in the cells; they have a different cell wall than bacteria.
Eukarya: cells do have a nucleus in them.

Complete answer:
The domains of Archaea and Bacteria (Figure below) are both composed entirely of small, single-celled organisms and appear very similar, but they also have important differences. All are made up of prokaryotic cells, which are nucleus-less cells. Also, both domains are composed of organisms that, by dividing into two, reproduce asexually (asexual reproduction). All are made up of prokaryotic cells, which are nucleus-less cells. Also, both domains are composed of organisms that, by dividing into two, reproduce asexually (asexual reproduction). There are also organisms with cells enclosed by a cell wall in both realms, but the cell walls are composed of various materials. Bacterial cell walls contain the polysaccharide peptidoglycan.
Within the nucleus, all the cells in the Eukarya domain retain their genetic material or DNA. Four kingdoms make up the Eukarya domain:
Plantae: By capturing energy from the light, a process called photosynthesis, plants, such as trees and grasses, thrive.
Fungi: Fungi, such as fungi and molds, live by "eating" other species or other organisms' remains.
Animalia: By eating other creatures or the remains of other organisms, animals also survive.
Protista: In the way that plants, animals, and fungi are, protists are not all descended from a single common ancestor.

Archaea	Bacteria	Eukarya
Multicellular	No	No	Yes
Cell wall	Yes, without peptidoglycan	Yes, with peptidoglycan	Varies. Plants and fungi have a cell wall; animals do not.
Nucleus (Membrane-Enclosed DNA)	No	No	Yes
Membrane-Bound  organelles	No	No	Yes

Note:
Archaea domain possesses single-celled organisms. Archaea have genes that are identical to both eukaryotes and bacteria. Since they are somewhat similar in appearance to bacteria, they were initially mistaken for bacteria. Such variations are large enough to warrant that there is a separate domain for archaea.