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Diversity Of Life > Random > Flashcards

Random Flashcards

0
Q

When did the earth form?

A

4.6 billion years ago

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1
Q

What is convergent evolution?

A

Evolution of similar traits because of similar selective pressures

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2
Q

When did prokaryotes evole?

A

3.5 billion years ago

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3
Q

When did eukaryotes evolve?

A

Between 1.8 and 2 million years ago

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4
Q

When did multicellularity evolve?

A

1.2 to 1.5 billion years ago

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5
Q

When did the End Cretaceous mass Extiction happen?

A

65.5 Mya

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6
Q

When did the end Permian mass Extiction happen?

A

251 MYA

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7
Q

What are some major events that happend in the Paleozoic?

A

Colonization of land.
Origin of vertebrates and vascular plans, insects and amphibians
Fish reptiles and insects diversify

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8
Q

What are some major events of the Mesozoic?

A

Origin of mammals and Dino’s
Come bearing plants diversify
Origin of flowering plants
Dino’s Extiction

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9
Q

What are some major events in the Cenozoic?

A

Continued diversification of flowering plants, mammals, birds, insects
Primates evolve

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10
Q

What is some evidence of the crater during the KT Extiction?

A

Iridium anomaly- unusually high levels of iridium in the rocks dating to about 65.5 Mmy
Unusual minerals- shocked quarts and microtektites
Impact crater- yucatan peninsula

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11
Q

What happens after mass exticitons?

A

Periods of adaptive radiation
Phyletic shifts
Shifts in dominance

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12
Q

Name the periods starting at Cambrian

A 
Cambrian
Ordovician 
Silurian 
Devonian
Carboniferous
Permian
Triassic 
Jurassic 
Cretaceous 
Paleogene 
Neogene
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13
Q

What are the first remnants of life called

A

Stromatolites

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14
Q

When was the major diversification of euk?

A

800 Mya

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15
Q

Describe simple multicellularity

A 
2 dimensional
Little to no communication 
Very little differentiation
All cells in contact with the environment 
Evolved multiple times
16
Q

What are some pros for simple multicellularity

A

Good for gathering resources
Give protection from predation
Anchor in desirable location
Lose part of body without being fatal

17
Q

Does simple multicellularity lead to complex multicellularity

A

No

18
Q

How did photosynthesis spread through euk?

A

Plastids of distantly related euk should fall into two different gourds depending on whether they evolved through an endosymbiosis with red or green algae

19
Q

What organisms are diploblastic?

A

Cnidarian and Ctenophora

20
Q

Are all bilaterally symmetrical animals triploblastic?

A

Yes

21
Q

What is the Coelm?

A

A fluid filled body cavity entirely lined by mesoderm

22
Q

What is a pseudocloem?

A

Fluid filled body cavity partly lined by mesoderm

23
Q

What are the two force generating tissues?

A

Muscle and myoepithelial cells

24
Q

What does a larger mechanical advantage mean?

A

Better for force production

Worse for speed

Diversity Of Life (12 decks)

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