In the Beginning…
The approximate age of the Earth.
What is 4.5 billion years old?
The meaning of the word evolution.
What is “change?”
Eukaryotic cells contain these structures.
What are organelles?
A special relationship between two different organisms which both benefit from living & working together.
What is symbiosis?
As the amount of O2 in the atmosphere increased, this formed 13-20km above the Earth’s surface.
What is the ozone layer?
The approximate number of years ago that life evolved on earth
What is >3.5 billion years ago?
A group of organisms of the same species living in the same area.
What is a population?
An increase in the amount of oxygen in Earth’s atmosphere initially caused this.
What is a mass extinction?
It is estimated that that roughly this percentage of all species to have ever lived on Earth have gone extinct.
What is 99%?
Roughly 230 mya, dinosaur evolved from this group of reptiles.
What were the archosaurs?
A term for all of the time since the Earth formed.
What is geologic time?
What we call a population when all members of its species have died.
What is extinct?
This collection of >500 million year old aquatic organisms was discovered in the Canadian Rockies.
What is the Burgess Shale?
We use these remains or impressions to learn about prehistoric organisms.
What are fossils?
It is thought that these two events were primarily responsible for the extinction of most dinosaurs.
What are an asteroid strike (creating Chicxulub crater) & volcanic eruptions (in modern-day India)?
Photosynthesizing organisms evolved 3 bya, spewing this waste product into the air - as evidenced by banded iron formations.
What is oxygen?
Define photosynthesis.
What is the act of taking in sunlight, water, & carbon dioxide to produce food?
There is evidence that both mitochondria & chloroplasts were once these types of organisms.
What are bacteria?
All cells contain this substance, which is easier to maintain in water than on land.
What is cytoplasm?
This class of vertebrates (amphibian, bird, fish, mammal, reptile) is thought to be the most recently evolved.
What are mammals?
The oldest fossils are of these organisms.
What are stromatolites formed by Cyanobacteria?
This occurs when a parent passes a modified trait to their offspring via DNA.
What is inheritable change?
The Endosymbiotic Theory explains how these evolved.
What are eukaryotic cells?
This group of dinosaurs escaped the mass extinction & involved into these.
What are “theropods“ & ”birds”?
These traits helped mammals escape mass extinction. (List 3)
What are burrowing, small size, being omnivores, & having fur?