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What are the major factors in species extinction?

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Habitat destruction and pollution.

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Why is studying fossils important?

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They help us understand evolution and environmental changes.

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What is a species?

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A group of similar organisms that can reproduce fertile offspring.

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What did new species do after the extinction of dinosaurs?

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They filled the niches left by dinosaurs.

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What can cause changes in ecological niches?

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Species extinction or evolution.

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What is habitat destruction?

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The process in which natural habitat is rendered unable to support the species present.

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What is pollution?

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The introduction of harmful substances or products into the environment.

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What is evolution?

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The process by which different kinds of living organisms develop and diversify from earlier forms.

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What is a fossil?

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The preserved remains or traces of a once-living organism.

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What is an ecological niche?

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The role and position a species has in its environment.