4.5 - Dating Stone Tools and 4.6B **Biology Only** - Anatomical Evidence for Evolution Flashcards
What evidence do stone tools provide?
Stone tools found in archaeological digs serve as evidence for human evolution.
What are Early Stone Age tools associated with?
Early Stone Age tools are associated with Homo habilis, dating back 1.5 million years ago.
What are Oldowan tools?
Oldowan tools are basic pebble tools created by smashing rocks together, used for simple tasks like cracking nuts.
What species used Late Stone Age tools?
Late Stone Age tools were used by Homo neanderthalensis (40,000 years ago) and modern Homo sapiens.
What types of tools were used in the Late Stone Age?
Late Stone Age tools included pointed arrowheads, spears, and hooks for advanced tasks like catching fish.
What is radiometric carbon dating?
Radiometric carbon dating estimates how long ago an organism lived by examining the radioactive decay of Carbon-14.
How can we date tools using once-living material?
If a tool is found with once-living material like wood or fur, we can date it to estimate the age of the rock.
What is stratifying rock layers?
Stratifying rock layers involves examining the sediment layer where a rock was found to date fossils and estimate when tools were formed.
How do fossils provide evidence for evolution?
Fossils help us understand how anatomical features developed over time, providing important evidence for evolution.
What is a pentadactyl limb?
A limb with five digits.
What does the presence of pentadactyl limbs in various organisms imply?
It implies that they all come from a common ancestor.
What could have caused different organisms to evolve from a common ancestor?
Different selection pressures within different environments.
Which organisms have pentadactyl limbs?
Humans, bats, cats, horses, and birds.
Do humans directly evolve from bats, cats, horses, or birds?
No, humans are distantly related to them via a common ancestor.
