Evidence of Evolution

All living things on this plant originated from a single organism 

• 3.8 bya

• 2.8 byo

• 4.8 bya

What did scientists use to think dinosaurs were descended from

• Reptiles

• Iguanas

• Diapsids 

• Other Dinosaurs

• People

During what time period did evidence of whales evolving from land animals become clear?

• the 1800s

• The 1970s and 1980s

• the 1990s and 2000s

• the late 1950s

What animals do whale ancestors have similar characteristics to?

• Monkeys and Gorillas

• Sharks and barracudas

• Dolphins and Porpoises

• Bison, Pigs, and Hippos

What is a vestigial structure?

• a structure organisms share in common because of a common ancestor

• a structure organisms have that have a similar purpose but not necessarily a similar development.

• a structure an organism shares in common with another organism

• a structure an organism has that no longer serves a purpose

Why do mammals such as bats, whales, and humans all have the same structure in their arms?

• It is the most efficient way to make the arm structure

• We are all descended from a common ancestor

Why do all vertebrates look similar in the early stages of their development

• Genetically Unique

• Descended from a common ancestor

• Because theyre all mammals

How can you use DNA to determine how closely an organism is related

• The DNA is inversely proportional to how closely they are related

• You cant use DNA to determine how closely they are related

• The more base pairs in common, the closer they are related

How much genetic information do you share in common with a fruit fly?

• 0%

• 15%

• 50%

• 98%

• 80%

What organism is the common ancestor of life on Earth, and how long ago did it exist?

• Eukaryote about 3.8 bya

• Eukaryote about 2.8 bya

• Prokaryote about 2.8 bya

• Prokaryote about 3.8 bya