Origin of Life

Question 1

Abiogenesis

Answer 1

formation of life from non- life

Question 2

What is necessary for life to form

Answer 2

water, mild alkaline pH and 40-70

Question 3

Miller-Urey Experiment

Answer 3

formed amino acids and nucleotide bases

Question 4

Formose Reaction

Answer 4

condensation reaction of formalehyde => sugars (ribose)

Question 5

Fischer-Tropsch Synthesis

Answer 5

mimicked hydrothermal vents, synthesis of fatty acids

Question 6

Protobionts

Answer 6

First step to cells, membrane surrounded abiotically produced molecules

Question 7

First Organisms

Answer 7

heterotrophic, 3.8 billion years ago

Question 8

Did the earliest photosynthesis produce oxygen?

Answer 8

No

Question 9

why was oxygenic photosynthesis developed

Answer 9

natural selection due to its presence in the atmosphere

Question 10

when was earth formed

Answer 10

4.6 billion years ago

Question 11

what is the earliest fossil

Answer 11

Stromatolites - layered bacteria and sediment

Question 12

What were the molecules present

Answer 12

water, hydrogen, methane and ammonia

Question 13

Hadean

Answer 13

formation of the planet, extremely hot

Question 14

Archaean

Answer 14

Life appears, continents formed and no oxygen

Question 15

Proterozoic

Answer 15

Oxygenated, eukaryotic and multicellular life

Question 16

Phanerozoic

Answer 16

Hard bodied organisms, plants then animals on land

Question 17

What are the 3 eras of the phanerozoic

Answer 17

Paleozoic, Mesozoic, Cenozoic

Question 18

Paleozoic

Answer 18

Boost of diversity

Question 19

Mesozoic

Answer 19

Dinosaurs => extinction

Question 20

Cenozoic

Answer 20

mammals