Adaptive Radiation

Adaptive radiation is a rapid increase in the number of species from a single common ancestor.

• Adaptive Ratiation

• Allopatric Speciation

• Convergent Evolution

• Gradualism

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The process by which an ancestral species gives rise to new species that are adapted to different environmental conditions and are less alike.

• Divergent Evolution

• Co-Evolution

• Convergent Evolution

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Cichlid fishes in lakes of the East African Rift. The lakes in this area are believed to support and sustain about 2,000 different species of these fish, each with different ecological and morphological characteristics such as body size. These lakes form a fragmented landscape that bio-geographically isolates the different species of cichlid fish from one another, allowing them, and many of the organisms they live with, to evolve separately.

• Phyletic Speciation

• Adaptive Radiation

• Convergent Evoltion

• Divergent Evoltuion

• Co-evolution

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Process in which organisms diversify rapidly into a multitude of new forms, particularly when a change in the environment makes new resources available, creates new challenges, or opens new environmental niches

• Adaptive Radiation

• Geographical Isolation

• Diversification through domination

• Recessive Isolation

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The image shows analogous structures.

• The image shows analogous structures.

• The image shows convergent evolution.

• The image shows adaptive radiation. 

• The image shows organisms that are not closely related.

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What typically happens after a mass extinction occurs?

• only organisms who lived in water survive

• nothing; all the species die out

• adaptive radiation

• biodiversity

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What is adaptive radiation?

• a strategy to preserve fossils

• the appearance of complex cells

• the acclimation of species to their environments

• a sudden, rapid increase in biodiversity

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What pattern can be observed from past mass extinctions?

• Mass extinctions primarily happen among species of plant life.

• Mass extinctions lower the Earth's total biodiversity for a significant amount of time.

• Mass extinctions are followed by adaptive radiations, increasing Earth's biodiversity.

• Mass extinctions are always caused by factors that do not originate on Earth.

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Which of the following best describes adaptive radiation?

• A process where species evolve rapidly to fill various ecological niches

• A slow evolutionary change over millions of years

• The merging of two species into one

• The extinction of a species due to environmental changes

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What is a key factor that drives adaptive radiation?

• Stable environmental conditions

• Lack of competition

• Availability of new ecological niches

• Genetic mutations

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