BIO 1500 chapter 16
1. The fossil records show changes over long time periods
• Emergence of terrestrial vertebrates
• Mass extinctions
• Key adaptations like flight, claws for defense, feeding adaptations: macroevolution-
ary
2. , layers of sedimentary rock, are the richest sources of fos-
sils.: Strata
3. Fossils: preserved remains of ancient organisms; records of changes in kinds
of organisms on earth over time
- Fossil records biased in favor of
,Species that ... , were abundant and widespread
Species that ... Fossilization usually in organisms with bony body parts, skele-
tons, teeth, or shells: species that lived for a very long time, had hard parts
4. The order of fossils in rock tell us the order in which they were formed
We can infer ages of fossils not actual ages
Geologists have created the , a standard time
scale that partitions the Earth's history into four eons and their subdivisions
of eras, periods, and epochs: strata, relative, geologic record
5. Geologic record: standard time scale that partitions the Earth's history into
these 4 eons...: •Hadean
• Archaean
• Proterozoic
, • Phanerozoic (last half billion years) subdivided into 3 eras:
6. What 3 eras is phanerozoic subdivided in?: •Paleozoic
• Mesozoic
• Cenozoic
7. Major boundaries between eras correspond to major events
reflected in fossil records: extinction
8. is a period in the era which was a
sudden increase in diversity of many animal phyla: cambrian, paleozoic
1. The fossil records show changes over long time periods
• Emergence of terrestrial vertebrates
• Mass extinctions
• Key adaptations like flight, claws for defense, feeding adaptations: macroevolution-
ary
2. , layers of sedimentary rock, are the richest sources of fos-
sils.: Strata
3. Fossils: preserved remains of ancient organisms; records of changes in kinds
of organisms on earth over time
- Fossil records biased in favor of
,Species that ... , were abundant and widespread
Species that ... Fossilization usually in organisms with bony body parts, skele-
tons, teeth, or shells: species that lived for a very long time, had hard parts
4. The order of fossils in rock tell us the order in which they were formed
We can infer ages of fossils not actual ages
Geologists have created the , a standard time
scale that partitions the Earth's history into four eons and their subdivisions
of eras, periods, and epochs: strata, relative, geologic record
5. Geologic record: standard time scale that partitions the Earth's history into
these 4 eons...: •Hadean
• Archaean
• Proterozoic
, • Phanerozoic (last half billion years) subdivided into 3 eras:
6. What 3 eras is phanerozoic subdivided in?: •Paleozoic
• Mesozoic
• Cenozoic
7. Major boundaries between eras correspond to major events
reflected in fossil records: extinction
8. is a period in the era which was a
sudden increase in diversity of many animal phyla: cambrian, paleozoic
