Term
| How long ago did life on Earth begin? |
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Definition
| About 3.8 billion years (recent evidence suggests closer to 4.4 billion years) |
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Term
| What do we call the remains of organisms preserved in the earth? |
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Definition
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Term
What is preserved in this fossil type??
[image] |
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Definition
| bones or hard body parts are preserved |
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Term
| What type of fossil is this?[image] |
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Definition
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Term
What fossil type is this? What might they be preserved in?
[image] |
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Definition
| original remains preserved in amber, sap, or ice |
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Term
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Definition
| When the fossils are compared to one another based upon where they are located in the ground. |
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Term
| When we measure the radioactivity given off of a fossil to determine its age, we call this what? |
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Definition
| radioactive or absolute dating |
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Term
| These types of simple celled organisms were probably the first on earth? |
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Definition
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Term
| What do we call living things made up of many cells? |
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Definition
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Term
| The earliest multicellular animals were probably what type of animal? |
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Definition
| tiny seaweed or possibly jellyfish |
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Term
| Until about 500 million years ago, all organisms probably lived where? |
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Definition
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Term
| The Permian extinction was significant because 90% of all species living where became extinct? |
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Definition
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Term
| The Cretaceous extinction from 65 million years ago is famous because of the disappearance of what? |
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Definition
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Term
| The process through which species change over time is called? |
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Definition
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Term
Natural Selection was the process brought forth by what individual?
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Definition
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Term
This is the definition for what process?
"Members of a species that are best suited to their environment survive and reproduce at a higher rate." |
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Definition
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Term
| Explain the process of overproduction. |
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Definition
| production of more offspring than can possibly survive in hopes that a few will reach adulthood |
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Term
What are 3 quality traits that might enable a sea turtle to survive and pass on its genes? |
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Definition
1. faster on land
2. good swimmer
3. quicker thinker |
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Term
| Natural differences in traits within a species is called? |
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Definition
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Term
| Variation (variety) within a species may occur when genetic material changes. This changing of genes is called what? |
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Definition
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Term
| When the changing of genetic material might give an animal a better chance of surviving. We call this what? |
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Definition
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Term
| Species do not have a choice in selecting what traits help them to survive. Fill in the blank to properly complete the sentence. "The __________ selects the trait!" |
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Definition
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Term
| What do we call the evolution of a new species from an existing species? |
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Definition
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Term
| What is absolutely necessary for speciation to occur? |
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Definition
| isolation. two groups must be isolated and therefore cannot reproduce. |
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Term
| Name 2 types of barriers that might lead to speciation? |
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Definition
| mountains, bodies of water, valleys |
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Term
| What do we call an early form of an organism from which later forms come from (descend)? |
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Definition
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Term
| What do we call a physical structure that was fully developed and working in an earlier group but is reduced and unused in later species? |
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Definition
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Term
| What do we call several periods in the earth's history when huge numbers of species died off? |
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Definition
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Term
| What do we call a segment of DNA that relates to a trait or function? |
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Definition
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Term
| A human arm, a dolphin flipper, an elephant leg, and a bird wing all perform differently but have a similar structure. A common ancestor is likely. Is it fossil evidence, biological evidence, or genetic evidence? |
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Definition
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Term
What do we call this structure which contains your DNA and, thus, your Genes?
[image] |
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Definition
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Term
Breeding two champion racehorses to (hopefully) produce a champion offspring is known as what?
a. natural selection b. artificial selection
c. variation d. just plain wrong |
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Definition
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Term
| What might cause relative dating of fossils to be incorrect? |
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Definition
| earthquakes, shifting of land, removal or movement of fossils |
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Term
Complete the following sentence:
In radioactive dating, "the older the fossil, the _______________." |
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Definition
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Term
Most species today are:
a. unicellular
b. multicellular |
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Definition
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Term
| These types of organisms are made of specialized cells. |
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Definition
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Term
| What contains the information all organisms need to grow and maintain themselves? |
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Definition
DNA
(deoxyribonucleic acid) |
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Term
Complete the sentence about relative dating:
"The deeper the fossil, the ______________."
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Definition
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Term
| These may replace the remains of an organism to form a fossil. |
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Definition
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Term
| Name 2 characteristics that are a result of a mutation in humans. |
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Definition
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