Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
History of Life
Biology
| Question | Answer |
|---|---|
| What trait did the earliest fish have that set them apart from all other organisms at the time? | a primitive backbone |
| What are the distinguishing characteristics of arthropods? | exoskeleton and jointed appendages |
| Which animals were the first vertebrates? | fish |
| Why was the atmospheric oxygen level 30% lower in the Cambrian period than today? | there were no plants on land |
| Which animals were the first to leave the water and walk on land? | arthropods |
| What affect did the first forests have on the environment that made it more suitable for land-dwelling animals? | Increased oxygen levels in the atmosphere |
| What adaptations made it possible for early amphibians to live on land? | complex lungs and limbs |
| What characteristics limited the colonization of the land by early amphibians? | moist skin and wet eggs |
| Why was the environment in the Carboniferous period able to support large arthropods? | there was 40% more oxygen |
| What adaptations did reptiles have that gave them more stamina and speed? | a complex heart |
| What adaptations allowed reptiles to live entirely on land? | dry, scaly skin and hard-shell eggs |
| Why was life in the late Permian so difficult for amphibians? | it was very hot and dry |
| What caused the oxygen levels in the Carboniferous period to go so high? | there were vast forests on land |
Created by:
StudySkillz
Popular Biology sets