Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/21

Click to flip

21 Cards in this Set

  • Front
  • Back
In order for biological organisms to become fossilized, the bones and tissue of the organism must become __________
Mineralized
When biological tissues as bone is covered by moten rock or embedded in slit and replaced by minerals, the resulting fossil is known as a
Replacement or compression
When spiders or insects are trapped in the secretions of trees that turns to amber and fossilizes them, the resulting fossils are known as _______ fossils
Resin
A method of determining the relative age of a fossil based on how deep it is within the sedimentary rock layers of the earth's surface is known as _________.
Stratigraphy
A type of dating that determines the date of fossils by determining the ratio between parent elements and their decay products in the rock surrounding the fossil is know as ________ dating
Radiometric
A fossil that represents a particular time period is known as an __________ fossil
Index
In the Rocky Mountains of Canada there is an area that iss unusually rich in fossils, Known as the ________ ____________.
Burgess Shale
Evidence suggest that the Burgess Shale was once a lime stone cliff located in the ______.
Sea or Ocean
The fossils found in the Burgess Shale were dated to be rougly ______ years old
550 Million
The burgess shale fossils are of organisms that lived in a geological period known as the __________ period.
Cambrian
During the Cambrian explosion, all of the current animal _______ ________ involved
Body plan
The first multicellular organisms on Earth were _________.
Sponges
Ancestral flatworms were the first organisms to develop a _________ body plan
Bilateral
One hypothesis for the cause of the Cambrian explosion is that animals were able to evolve because a proper level of atomspheric _________ had been achieved
Oxygen
The huge explosion in evolution of new body plans documented in teh Burgess Shale is known as the ________ _________
Cambrian Explosion
How was the Burgess Shale formed and what does it contain?
Look at study guide
What are living fossils and what are two examples?
Look at study guide
How do the Lampsillis mussel and large mouth bass demonstrate an evolutionary arms race?
Look at study guide
How have bats and moths evolved due to an evolutionary arms race?
Look at study guide
How has an evolutionary arms race determined the abilities of the cheetah and gazelle?
Look at study guide
List and briefly define the 5 types of fossils
Look at study guide