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Evolution > Evolution/Extinction/Evidence > Flashcards

Evolution/Extinction/Evidence Flashcards

1
Q

What are fossils?

A

solidified remains or imprints of once-living

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2
Q

What are constructed using fossils?

A

Fossil Record

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3
Q

What is a fossil record also known as?

A

The historical sequence of life

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4
Q

What are Paleontologists?

A

Scientist who look for fossils to help them reconstruct what happened in the past

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5
Q

What is the Earth’s crust arranged in?

A

Layers of rock and soil stacked on top of each other

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6
Q

Could fossils be any living organism?

A

Yes

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7
Q

The deeper the layer, the older or younger the fossil?

A

The older the fossil

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8
Q

What is the PA state fossil?

A

Trilobite

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9
Q

What are Vestigial Structures?

A

Remnants of structures that had a useful role at one time but no longer do

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10
Q

Why are there Vestigial Structures?

A

It suggests that the organism evolved from another life form where that structure played an important role.

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11
Q

What are examples of Vestigial Structures?

A

Wisdom Teeth, Human Tailbones, Hind-limb bones in whale and some snakes

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12
Q

What are Skeletal Structures?

A

Bone structures of mammals are very similar a common origin

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13
Q

What makes someone have similar DNA with another person?

A

When they are closely related.

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13
Q

What organisms have DNA?

A

ALL ORGANISMS!

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14
Q

How identical is a chimp’s gene and a human’s gene?

A

98%

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15
Q

How identical is a mouse’s gene and a human’s gene?

A

70%

16
Q

What are the basic unit of life?

A

Cells

17
Q

What do all living organisms start as?

A

A single cell

18
Q

What is a geologic time scale?

A

An outline of history of life on Earth

19
Q

What are large blocks of time divided called?

A

eras

20
Q

What are eras characterized by?

A

The animal that dominated the Earth at that time.

21
Q

How many percent of species that ever existed are now extinct?

A

99%

22
Q

What are some natural causes of extinction?

A

Climate change, Pollution, Disease

23
Q

What also happens during Extinction?

A

evolution of new species that usually quickly fill in the space another species’ extinction creates

24
Q

What is background extinction?

A

The continual extinction of species (basically slowly dying)

25
Q

What is mass extinction?

A

The accelerated extinction rates that sharply reduce the diversity of life on Earth (IMMEDIATE!!!)

26
Q

What did continents used to be?

A

A single landmass called pangaea

27
Q

Where are the organisms that evolved before the split may be represent on today?

A

On all present continents

28
Q

Where are the organisms that evolved after the split may be represent on today?

A

Only found in certain places

Evolution (2 decks)

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