Question

Relative to the percent of time dominating the surface of the Earth, which organisms have been here the longest?

1. eukaryotes
2. prokaryotes (single celled organisms)
3.plants
4.dinosaurs

Answer 1

Prokaryotes (single celled organisms)

Step-by-step explanation:

Prokaryotes are single celled organisms or unicellular that lack membrane bound organelles such as the nucleus. Instead their DNA us found in a coiled loop floating freely in the cytoplasm in a region called the nucleoid. Examples that include prokaryotes are Bacteria and Archaea.

They have been estimated to exist on Earth about 3.5 billon years ago where life first started.