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Flashcards in Palentology Deck (12)
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0

When did the "earth" form and how?

4.5 billion years old

Gas & dust in the

solar nebulae - gas & dust swirling around
* formed planets and sun (star)

1

When did life first emerge?

3.8 billion years

2

What is paleontology?

Study of prehistoric life, including how organisms evolved & how they interacted with their environment

3

What are fossils?

The principal type of evidence about prehistoric life

Sap, tar, & rock impress an organism & give skeletal structure of that animal

4

Were dinosaurs (crustaceous period) one of the first organisms on the earth? Did they live with people?

No not one of the first

No did not live with people & dinosaurs

5

How did life begin on earth?

Simple, single-cellular organisms
Prokaryotic - no nucleus
&
Remained for about half of life's history

6

When did the first multi-cellular plants & fungi emerge?

1.2 - 1.7 billion years ago

Ex. Algae & Bacteria

Algae was first photosynthetic organism

7

When did the first multicellular animals emerge?

580 million years ago

8

When did anatomically modern humans (homosapian-sapian) emerge?

200,000 years ago

9

What is a eukaryote and how did it emerge?

Eukaryote - cell with a nucleus

Prevailing theory is that

1. a larger prokaryote engulfed a smaller prokaryote

2. and the smaller prokaryote became the nucleus

10

With photosynthetic plants & algae emerging, what began to happen?

1. Oxygen was released into the atmosphere

2. Causing more animals to emerge

3. Water animals came onto the land

11

Nebulae & gas can form?

Protostars - "before-they-are-stars"