Unit 1 Lesson 3
The remains or imprints of once-living organism covered in sediment layers.
What is a "Fossil"?
Related organisms share similar structural traits.
What is common structures?
The largest divisions of the geologic time scale
What is eons?
The greek word that means middle life
What is mesozoic
Bacteria, archaea, and eukarya.
What are the three domains?
All the fossils that have been discovered.
What is the fossil record?
Organisms that have fewer amino acids differences.
What is similar DNA?
Four major divisions that make up the history of life on earth.
What is the Precambrian, Paleozoic, Mesozoic, and Cenozoic era?
The greek word that means recent life
What is cenozoic
Protista, plantae, fungi, and animalia.
What are the four kingdoms in Eukarya?
The most recent species from which two different species have evolved.
What is a common ancestor?
The study of development.
What is embryology?
Use sunlight to make their food
What is cyanobacteria
Eight levels.
How many levels of classification are there?
He simplified the naming of living things.
What did Carolus Linnaeus do?
When rock layers cover up a fossil in sediment.
What is the formation of fossils?
When every individual of a species dies
What is extinction?
Estimates the age of a fossil in years
What is absolute dating
- Is the organism single-celled or multicellular?
- Does it make its own food or get it from the environment/
- How does it reproduce?
Which three questions do scientists ask to decide in which kingdom to classify an organism?
Shows relationships among species.
What is a cladogram?
Shows that life on earth has changed over time.
What is evidence of fossils?
Standard method used to divide Earths long 4.6 billion year natural history into manageable parts
What is a the geologic time scale?
The greek word that means ancient life
What is paleozoic
Uses a series of paired statements to identify organisms.
What is a dichotomous key?
Scientists classify living things based on characteristics that living things share.
How do scientists keep all living things organized?