Taxonomy, Classification, Evidence of Evol

The structures shown are_________

• homologous
• heterologous
• analogous
• vestigial

A fossil of an extinct dinosaur is found and the anatomy of the fossil shows similarities to that of a bird. What could this mean?

• This is purely by chance and isn't significant
• The extinct dinosaur and modern bird share a common ancestor
• All dinosaurs evolved into birds and that's why there aren't any dinosaurs alive today
• Dinosaurs choose to fly, and evolved into birds to escape predation and capture food

In the the third embryonic stage (bottom row), mammal embryos _____

• have more characteristics in common with each other than with reptiles or birds.
• are still hard to tell from reptiles and birds.
• have the same features as fish, reptiles, and birds.
• do not have tails.

The five species illustrated most likely have

similar limb structures because they all -

• share a common ancestor

• use their limbs for the same functions

• occupy the same level on the food pyramid

• adapted to the same environmental conditions

Which information would best help scientists verify the relationships among the organisms shown above?

• The organisms’ nutritional requirements

• The organisms’ DNA sequences

• The organisms’ migratory patterns

• The organisms’ population sizes

The diagram illustrates an embryonic stage of two organisms. Which of the following can be determined by observing the embryos shown in the diagrams?

• The organisms share a common ancestry

• The organisms belong to the same genus

• The organisms are native to the same geographic areas

• The organisms will grow into anatomically similar adults

Which evidence of common ancestry is being studied in this visual?

• biogeography
• fossil record
• anatomical homology
• molecular homology

Which evidence of common ancestry is being studied in this visual?

• biogeography
• fossil record
• anatomical homology

Which evidence of common ancestry is being studied in this visual?

• biogeography
• fossil record
• anatomical homology

Scientists compare the limbs of organisms to look for evidence of common ancestry. These limbs provide evidence of common ancestry because they -

• perform the same function
• are the same size
• have the same basic structure
• are parts of the same animal