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Biology Lecture Exam 1 > Fossils | Study Cards > Flashcards

Flashcards in Fossils | Study Cards Deck (13)
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1

What is the purpose of Paleobiology

To help discover, desrcibe, and name new fossil species

2

What is the purpose of a fossil record?

Is the primary source of data about evolutionary history & is the physical proof that these beings once existed.

3

Fossils found in the highest strata are the ___

most recent

4

Fossils found in the lowest strata are the ___

oldest

5

Give examples of a hard structure:

Shells
Teeth
Bones
Wood
Leaves

6

What happens to soft remains?

They are eaten by scavengers or decompose

7

What are some drawbacks of fossils?

Provides an incomplete portrait of the past as there are only 300,000 fossil species 

8

List the 4 most common fossils:

- 1) Hard bodied
- 2) Have to wide spread
- 3) Abudant Organisms
- 4) Lived near swamps & shallow seas with sedimanetaion

9

How can fossils be deformed?

by the pressure of rocks & destroyed by geological disturbances

10

What is Relative Dating

Give a relative age based on the position of strata layers

11

List the 3 cons of Relative Dating

- 1) Not always deposited in horizontal fashion
- 2) Provide no information in age in yrs
- 3) Can be large gaps in the geological record

12

What is Absolute Dating

Uses isotopes & Radioactive decay

13

What are the 5 pieces of information that fossils provide?

1) Can estimate the size & appearence of ancient plants & animals

2) Can reconstruct what the vegetation/ecosystem was

3) Weather prediction

4) How structures were modified & the extinction of evolutionary lineages

5) Geographic distribution of ancient organsims