Members of which domain were thought to be some of the first organisms on earth, billions of years before the dinosaurs?
a. viruses
b. eubacteria
c. eukarya
d. archaebacteria
need

Ans. (D). Archaebacteria.

Archaebacteria or archaea make a domain of single-celled, prokaryotic organisms. These organisms were the first living organisms with simple, primitive cells, having no true nucleus and other membrane-bound organelles.

These organisms had tolerance for extreme environmental conditions, such as salt lakes and hot springs, where other life-forms could not survive.

Thus, the correct answer is option (D).

no moderator inbox me? ?