Front

What is phylogeny?

Back

Phylogeny is the study of the evolutionary history and relationships among individuals or groups of organisms.

Front

What are theropods?

Back

Theropods are a group of bipedal dinosaurs that include modern birds and are characterized by hollow bones and three-toed limbs.

Front

Do theropods have light bones?

Back

No, theropods do not have light bones; they have hollow bones that make them lighter.

Front

What is a cladogram?

Back

A cladogram is a diagram that shows the evolutionary relationships among a group of organisms.

Front

Which group on the cladogram arose first?

Back

Theropods arose first among the options provided.

Front

How can you determine relatedness in a cladogram?

Back

Relatedness can be determined by the branching points; organisms that share a more recent common ancestor are more closely related.

Front

What does it mean if two organisms are closely related?

Back

If two organisms are closely related, it means they share a more recent common ancestor in their evolutionary history.

Front

Which organism is the most distantly related to all the others?

Back

The dog is the most distantly related organism among the options provided.

Front

What are Saurischian dinosaurs?

Back

Saurischian dinosaurs are a clade of dinosaurs that includes theropods and sauropodomorphs, and they are most closely related to birds.

Front

What are Ornithischian dinosaurs?

Back

Ornithischian dinosaurs are a clade of dinosaurs characterized by their bird-like hips, but they are not directly related to birds.