Patterns of Evolution

Question 1

Patterns of Evolution

Answer 1

evolution of species that have been identified through fossil evidence, or still exist on Earth.

Question 2

Divergent Evolution

Answer 2

describes two or more species that originate from a common ancestor. May happen as a result of:
-Adaptive radiation
-Geographic isolation
-Reproductive isolation

Question 3

Homologous Structures

Answer 3

common ancestor. Structures have same structure but serve a different function.
Eg. same basic bone structure, but a penguin uses appendage to swim whereas a bat uses theirs to fly.
Shared ancestry
Similar internal structure
May look different externally

Question 4

Convergent Evolution

Answer 4

describes unrelated species that share similar traits due to exposure to similar ecological conditions or selection pressures.

Question 5

Analogous Structures

Answer 5

serve the same function but have a different structure.
Eg. penguins, dolphins, turtles, and sharks all have peripheral fins
Eg. Butterflies and birds have wings.
No shared ancestry
Similar function
May look similar externally

Question 6

Parallel Evolution

Answer 6

describes two related species or lineages that have evolved similar adaptations after divergence from a common ancestor

Question 7

Coevolution

Answer 7

Unrelated organisms evolving together. When 2 species have lived together and adapted to each other for a long time, that changes in the gene pool of one species results in changes in the gene pool of other species

Eg. Plants and Pollinators
Predator Prey Relationships

Question 8

Adaptive Radiation

Answer 8

occurs when several species evolve from a common ancestor and each species is specifically adapted to fill a niche