Biology

chelicerae

hexapods

diplopods

chilopods

crustaceans

amoeba uses pseudopodia for movement

They do not have roots, stems, or leaves

Edited answer:

Algae come under primitive plants as these ahve varity of forms ranging from unicellular to multicellular colonial and filamentous and have undifferentiated body.

Eukarya

They both make energy using the sun

It is poisoned by oxygen

There is strong and growing evidence that Archaea are the closest current example of the original form of life on Earth and it is thus possible that the origins of life on other planets may be found in similar organisms.

More Information:

The term archaebacteria is now considered outdated since in recent years it has come to be understood that Archaea and Bacteria share little and have long and distinct evolutionary backgrounds.

The Archaea are single-celled microorganisms with no cell nucleus or any other membrane-bound organelles. As such, the are highly simplified. The archaeal lineage may be the most ancient that exists on Earth.

See related links.

"Genetics" - Gradpoint Mrs. Degenarro :)

Cells with nulcei ---- Novanet

Brown algae.

coorperation