ch27 pt2

Question 1

Stromatolites

Answer 1

1st prokaryotes
1st life forms

Question 2

Oxygen revolution

Answer 2

Spike in oxygen due to cyanobacteria, one of the first organisms to perform photosynthesis

Question 3

Serial endosymbiosis

Answer 3

Mitochondria were first then placid followed
“symbiosis” - two organisms using each other for benefit

Question 4

Endosymbiotic support

Answer 4

Mitochondria and chloroplast replicate like prokaryotes

Question 5

Timeline

Answer 5

1) Multicellular organisms
2) Sexual reproduction
3) Edicarian biota (soft-bodied invertebrate)
4) Cambrian Explosion (large predators emerge)
5) Antropods
6) Tetrapods
7) Humans

Question 6

Cambrian

Answer 6

Life landmark
1st chordates

Question 7

Ordovician

Answer 7

Life landmark
Jawless fish

Question 8

Sirulian

Answer 8

Life landmark
Jawed fish

Question 9

Devonian

Answer 9

Life landmark
1st reptiles

Question 10

Carboniferous

Answer 10

Life landmark
1st reptiles

Question 11

Permian

Answer 11

Life landmark #6

Question 12

Mesozoic Era

Answer 12

Life landmark
Age of Reptiles
Triassic, Jurassic, Cretaceous

Question 13

Cenozoic Era

Answer 13

Life landmark
Age of mammals

Question 14

Holocene

Answer 14

Life landmark
Age of humans