Extinction (GCSE Biology)

A sudden large reduction in the size of a population due to an environmental event can reduce genetic variation. What is this event called in evolutionary terms?

Why might captive breeding and reintroduction sometimes fail to prevent extinction?

How does excessive hunting or over-exploitation of a species contribute to its extinction even when habitat remains available?

Which international list or system is commonly used to classify species by their risk of extinction (e.g., endangered, vulnerable)?

Why is genetic variation within a species important for preventing extinction?

What is adaptive radiation and how can it relate to extinction events?

What role do mutations play in evolution and extinction?

Which human activity is a major direct cause of modern extinctions by destroying or fragmenting habitats?

Which practice by humans is an example of artificial selection that can reduce genetic diversity and potentially increase extinction risk for a domesticated breed?

Which type of speciation occurs when geographic isolation (e.g., a mountain range or river) separates populations leading to reproductive isolation?

Which of the following is an example of microevolution that can occur rapidly and sometimes lead to local extinction of sensitive species?