Endangered

The video tutorial discusses the concept of extinction, highlighting how its definition can vary but is generally assessed by observing changes in population size. It also introduces the International Union for Conservation of Nature (IUCN), which compiles a Red List of species at risk, categorizing them as vulnerable, endangered, or critically endangered.

What is one method used to evaluate the risk of extinction?

• Observing animal behavior

• Measuring the height of animals

• Counting the number of species

• Monitoring changes in population size

Which organization is responsible for creating a list of species under threat?

• United Nations Environment Programme

• Greenpeace

• International Union for Conservation of Nature

• World Wildlife Fund

What is the purpose of the Red List produced by the IUCN?

• To rank species by size

• To list all known species

• To categorize species based on their threat level

• To provide a guide for animal behavior

Which of the following is NOT a category of threat listed by the IUCN?

• Vulnerable

• Endangered

• Critically Endangered

• Extinct

What does the 'critically endangered' category indicate about a species?

• The species is not at risk

• The species is extinct

• The species is at high risk of extinction

• The species is thriving