Patterns of evolution

Describes a pattern of long, stable periods interrupted by brief periods of more rapid change

• convergent evolution

• coevolution

• punctuated equilibrium

• adaptive radiation

The hypothesis that evolution of a species occurs gradually over time as a slow and constant process is known as

• speciation
• punctuated equilibrium
• gradualism
• microevolution

The hypothesis that evolution of a species occurs in periods of rapid change separated by periods of little or no change is called

• divergence
• gradualism
• punctuated equilibrium
• isolation

The evolution of an ancestral species into different species that occupy different habitats.

• convergent evolution

• coevolution

• speciation

• adaptive radiation

What is convergent evolution?

• evolution toward similar traits in unrelated species
• evolution toward different traits in closely related species
• elimination of a species from Earth
• the rise of two or more species from one existing species

 What type of evolution is demonstrated in this photo?

• Coevolution
• Convergent evolution
• Punctuated evolution
• Gradualistic evolution

Two organisms change in response to each other forming a specialized relationship.

• Coevolution

• Convergent Evolution

• Gradualism

• Extinction

The Galápagos tortoises share a common ancestor, but have necks of different lengths to best reach the food they need in their environment.

• Convergent

• Divergent

• Coevolution

Whales, sharks, and penguins all have streamlined bodies and fins/flippers for moving in water even though they belong in different classes of animals (mammals, fish, and birds)

• Convergent

• Divergent

• Coevolution

Hummingbirds have a beak just the right length to reach the nectar in a cardinal flower and as they feed their foreheads bump into the pollen structure. Cardinal flowers are red which hummingbirds can see but bees can’t. Cardinal flower’s pollen structure is just the right length for the hummingbird to pick up pollen as it feeds

• Convergent

• Divergent

• Coevolution