What is adaptative radiation?

Answer 1

Adaptive radiation is the evolution of a new species in a relatively short period of time. When many species share a single ancestor. burst of diversification of a group of organisms into an array

of niches.

ADAPTIVE CAUSES:

• After mass extinction:

- Reptile radiation after P-Tr

- Mammal radiation after K-T

• Novel environment:

- Sweepstakes routes

• Evolutionary transition:

- Conquest of land, air

• Removal of a barrier

- Return of more oxygenated conditions

• Key Innovation

- Examples: Flight, pharyngeal jaws

Answer 2

single ancestor

Answer 3

when many species share a single ancestor