Mercury, Sulfur and Oxygen
An ovary is the reproductive part of the uterus that produces the egg (ovum) to be fertilized by the sperm
a polymer bcz it contains more than 10 residues and all others are single residues.
Answer: prokaryotes (single celled micro-organisms/microbes)
Explanation: The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.
