History Of Earth

Question 1

Two gases that former the atmosphere

Answer 1

Most dense were hydrogen and nitrogen

Also contained carbon dioxide, water vapor, nitrogen, and no oxygen

Question 2

When did bacteria first appear

Answer 2

3.5 billion

Question 3

How did oceans form

Answer 3

From lots of rain from the surface of the earth cooling enough

Question 4

Why were oceans brown

Answer 4

Die to iron content in the water

Question 5

Formation of microspheres

Answer 5

Large organic molecules can sometimes form tiny bubbles called proteinoid microspheres and are selectively permeable

Question 6

Evolution of rna and DNA

Answer 6

Rna had evolved first

RNA can reproduce by themselves

Question 7

Endosymbiotic theory

Answer 7

Eukaryotic cells arose from loving communities

Mitochondria and. Chloroplast are similar to bacterial DNA

Question 8

Sexual reproduction and multi cellular organism

Answer 8

single celled eukaryotes reproduce sexually allows for a diverse species and increased rate off evolution