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Live science module B unit one lesson three
Terms in this set (27)
Where have fossils been found?
Amber, ice, sedimentary rock
Formed when particles of sand or soil are deposited in horizontal layers which occurs in mud or Celt
What is the most basic principle of dating such rocks and other remains of organisms inside?
The deeper it is the older it is
Form when a small creatures are trapped in tree sap and the sat hardens
Remains or imprints of once living organisms
How do you fossils form?
Dead organisms are covered by a layer of sediment or mud and overtime more sediment settles on top of the organism
Forms when a mold is filled with sand or mud that hardens int other shape of an organism
Most fossils are hard parts of what?
Shell and bones
Do most dead organisms become fossils?
What happens to most dead organisms?
They are recycled back into the biological world by scavengers, decomposers, or the process of weathering
All the fossils that have been recovered
What does the fossil record provide?
Evidence about the order in which species have existed through time and how they have changed over time
Are there gaps in the fossil record?
What did the gaps represent for chunks of geological time for which a fossil has?
Not been discovered yet
What are fossils that fill in gaps in the fossil record gaps?
What do fossils have that are found in new layers of earths crust?
Physical or molecular similarities to present day organisms
Fossils in new layers of the earth that tend to resemble present day
Some fossils may be of earlier life-forms that do no what?
What kind of ancestor is the most recent species from like two different species have evolved?
What are four things that support the theory that populations change over time?
Structural data, DNA, developmental patterns, and fossils
What makes the human hand similar to the front lens of a cat and a bat?
They have same bones in the same place
Study of development
In what order are fossils form?
1. In organism dies and its body is covered with a layer of sediment
2. Time passes and a sediment layers continue to build app all organisms
3. Minerals in feet into the organisms body and replace it with stone
4. The organism completely decomposes leaving behind an imprint
What is an example of cases provide embryological evidence that two species share a common ancestor?
Two different species with similar patterns of early development
What is an example of an unused body structure?
Tiny leg bones found in snakes that have no legs
What is the best example that describes the tiny leg bones that some whales have which do not aid in their movement or serve any other function?
Structures that have lost all or most of their function over evolutionary time
What is a parrot features that have a similar structure but have different function in each organism?
The front leg of a cat in the wing of a bat
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