Evolution Flashcards
(33 cards)
1
Q
Formation of Earth
A
4.54 bya
2
Q
Last Universal Ancestor
A
3.5 bya
3
Q
First multi-celled life forms
A
1 bya
4
Q
First complex animals
A
600 mya
5
Q
First vertebrates
A
525 mya
6
Q
First land plants
A
475 mya
7
Q
First tetrapods
A
395 mya
8
Q
First dinosaurs
A
243 mya
9
Q
First mammals
A
225 mya
10
Q
First birds
A
150 mya
11
Q
First primates
A
85 mya
12
Q
Dinosaur extinction
A
65 mya
13
Q
First hominids
A
20 mya
14
Q
First ‘Homo’ species (H. hablis)
A
2.3 mya
15
Q
First H. sapiens
A
200, 000 ya
16
Q
Precambrian
A
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
Q
Paleozoic Era includes which periods?
A
- Cambrian (oldest)
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian
18
Q
Onset of Cambrian
A
542 mya
19
Q
Onset of Ordovician
A
488 mya
20
Q
Onset of Silurian
A
444mya
21
Q
Onset of Devonian
A
416 mya
22
Q
Onset of Carboniferous
A
359 mya
23
Q
Onset of Permian
A
299 mya
24
Q
Mesozoic Era includes which periods?
A
- Triassic (oldest)
- Jurassic
- 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
31
How many ice ages were there?
6
32
How many mass extinctions were there?
5
33
When were the mass extinctions?
1. Ordovician/ Silurian
2. Late Devonian
3. Permian
4. Triassic/ Jurassic
5. Cretaceous/ Tertiary
