Evolution and Ecology

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What is a population in ecology?

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A population is a group of members of the same species that live in a defined area.

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What biome is characterized by permafrost?

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The Tundra biome is covered in permafrost (frozen subsoils).

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What happens to the food web if a key species is removed?

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Removing a key species, like the snowshoe hare, can lead to a decrease in populations of species that rely on it for food, such as shrews.

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What is the greenhouse effect?

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The greenhouse effect is a phenomenon where heat is trapped by gases in the atmosphere and sent back to Earth's surface.

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What type of evidence can DNA provide in evolutionary studies?

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DNA provides genetic evidence that can show relationships between species and support theories of evolution.

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Define ecosystem.

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An ecosystem is a community of living organisms interacting with their physical environment.

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What are vestigial structures?

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Vestigial structures are body parts that have lost their original function through evolution, such as the human appendix.

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What are homologous structures?

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Homologous structures are body parts in different species that share a common ancestry, indicating evolutionary relationships.

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What is biodiversity?

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Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of species.

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What is a food web?

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A food web is a complex network of feeding relationships among organisms in an ecosystem.