Evolution

The law of superposition states

• the oldest rock layer is on the top, the younger rock layer is on the bottom
• rock layers are always in sequence from oldest to youngest
• the youngest rock layer is on the bottom and the oldest is on the top
• the oldest layer is on the bottom and the youngest is on the top when it is undisturbed

Scientist find dinosaur fossils in the bottom of a cliff and mammals fossils in the middle layer, what can be inferred?

• dinosaurs ate plants
• dinosaurs were eaten by the mammals
• they lived at the same time
• dinosaurs lived before the mammals

Ostrich wings are examples of

• homologous structures
• vestigial structures
• adaptations
• traits

Dolphins have the same arm structure as wolfs, what type of evidence for evolution does this represent?

• DNA
• vestigial structures
• homologous structures
• embryology

What would indicate that a series of fossils represent evolution?

• the fossils were identical
• the fossils were found in the same layers of rock
• the fossils show similarities
• the fossils were completely different

Why do embryologist study embryos?

• to see if they are related
• to understand adaptations
• to determine the age
• to learn what parents are vestigial

What is embryology?

• the age of organisms
• the oldest stage of development
• the life span of an organism
• the earliest growth stage of development

What animal is Darwin known for studying?

• dinosaurs
• tunicates
• finches
• horses

Natural selection is

• survival of the fittest
• humans change
• two species are the same
• more animals survive

This makes an organism more suited to its enviornment

• species
• lifespan
• adaptation
• mutation