Based on fossil evidence, eukaryotes evolved about years ago. based on fossil evidence, eukaryotes evolved about years ago. 500,000 1.5 billion 2.1 billion 3.5 billion

Fro the answer to the question above,
Based on fossil evidence, eukaryotes evolved about 2.1 billion years ago.
Approximately the first single-celled Eukaryotes appeared 2.1billion years.

But the multicellular eukaryotes first appeared at 1.5 billion years ago.
I hope this helps

C. gemstones they are the only non metallic mineral from the list.

Characteristic expected of mineral from lava at earth's surface

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.