Bio 1500 Schul and Bush Test 1
Questions and Answers 100% Pass
Order odanata characteristics - ✔✔Dragonflies
First fossils found 325 mya (Carboniferous)
First 3 years of life --> water
Lay eggs and catch insects in flight
Meganeura: 3 feet long wingspan (t. 6 in.), 150 grams (t. 1 gram)
Main difference between animals today and during Carboniferous? Why? - ✔✔During
Carboniferous animals were much larger due to higher oxygen concentration
What are two hypotheses as to why dragonflies were bigger in the Carboniferous than
they are today? Evidence from EarthViewer? - ✔✔Increased oxygen concentration and a
lack of aerial predation/competition. EarthViewer corroborates that oxygen levels
peaked during the Carboniferous and afterwords went way down. EarthViewer also
corroborates that there was a lack of biodiversity and therefore aerial predators during
the Carboniferous
100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 1
, 13.7 bya - ✔✔Universe formed (Big Bang)
4.6 bya - ✔✔Earth formed
3.8 bya - ✔✔First evidence of life
2.5 bya - ✔✔Cyanobacteria found (first organism that used oxygen)
2.0 bya - ✔✔Eukaryotes (containing complex cell organelles)
750-600 mya - ✔✔"Snowball" ice ages
590 mya - ✔✔First animals
230 mya - ✔✔Dinosaurs
150 mya - ✔✔Birds
2 mya - ✔✔Homo genus
Carboniferous in big picture of earth's history? - ✔✔360-300 mya, so relatively recently
in ecological time period. Between first animals and dinosaurs
Clapham and Karr data and their relevance to class hypothesis about dragonfly size -
✔✔Oxygen hypothesis - Data shows that as oxygen concentration increased, so did
maximum insect wing size.
Aerial predation hypothesis - Data shows the relationship between oxygen and size
disappears at some point. This coincided with the evolution of aerial predators.
100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 2
Questions and Answers 100% Pass
Order odanata characteristics - ✔✔Dragonflies
First fossils found 325 mya (Carboniferous)
First 3 years of life --> water
Lay eggs and catch insects in flight
Meganeura: 3 feet long wingspan (t. 6 in.), 150 grams (t. 1 gram)
Main difference between animals today and during Carboniferous? Why? - ✔✔During
Carboniferous animals were much larger due to higher oxygen concentration
What are two hypotheses as to why dragonflies were bigger in the Carboniferous than
they are today? Evidence from EarthViewer? - ✔✔Increased oxygen concentration and a
lack of aerial predation/competition. EarthViewer corroborates that oxygen levels
peaked during the Carboniferous and afterwords went way down. EarthViewer also
corroborates that there was a lack of biodiversity and therefore aerial predators during
the Carboniferous
100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 1
, 13.7 bya - ✔✔Universe formed (Big Bang)
4.6 bya - ✔✔Earth formed
3.8 bya - ✔✔First evidence of life
2.5 bya - ✔✔Cyanobacteria found (first organism that used oxygen)
2.0 bya - ✔✔Eukaryotes (containing complex cell organelles)
750-600 mya - ✔✔"Snowball" ice ages
590 mya - ✔✔First animals
230 mya - ✔✔Dinosaurs
150 mya - ✔✔Birds
2 mya - ✔✔Homo genus
Carboniferous in big picture of earth's history? - ✔✔360-300 mya, so relatively recently
in ecological time period. Between first animals and dinosaurs
Clapham and Karr data and their relevance to class hypothesis about dragonfly size -
✔✔Oxygen hypothesis - Data shows that as oxygen concentration increased, so did
maximum insect wing size.
Aerial predation hypothesis - Data shows the relationship between oxygen and size
disappears at some point. This coincided with the evolution of aerial predators.
100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 2
