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Flashcards in Evolution Deck (33)
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1

Formation of Earth

4.54 bya

2

Last Universal Ancestor

3.5 bya

3

First multi-celled life forms

1 bya

4

First complex animals

600 mya

5

First vertebrates

525 mya

6

First land plants

475 mya

7

First tetrapods

395 mya

8

First dinosaurs

243 mya

9

First mammals

225 mya

10

First birds

150 mya

11

First primates

85 mya

12

Dinosaur extinction

65 mya

13

First hominids

20 mya

14

First 'Homo' species (H. hablis)

2.3 mya

15

First H. sapiens

200, 000 ya

16

Precambrian

4.6 - 2.5 bya
Consists of:
1. Proterozoic - 2.5 bya
2. Archean - 3.8 bya
3. Hadean - 4.5-4.6 bya

17

Paleozoic Era includes which periods?

1. Cambrian (oldest)
2. Ordovician
3. Silurian
4. Devonian
5. Carboniferous
6. Permian

18

Onset of Cambrian

542 mya

19

Onset of Ordovician

488 mya

20

Onset of Silurian

444mya

21

Onset of Devonian

416 mya

22

Onset of Carboniferous

359 mya

23

Onset of Permian

299 mya

24

Mesozoic Era includes which periods?

1. Triassic (oldest)
2. Jurassic
3. Cretaceous

25

Onset of Triassic

251 mya

26

Onset of Jurassic

201.6 mya

27

Onset of Cretaceous

145.5 mya

28

Cenozoic Era includes which periods?

1. Tertiary (oldest)
2. Quaternary

29

Onset of Tertiary

65.5 mya

30

Onset of Quaternary

2.6 mya