Biodiversity Review

What is THE most major cause of extinction today?

• habitat destruction by humans
• poaching
• disease
• hunting

Biodiversity usually refers to

• extinct species

• the variety of species in an ecosystem

• nonrenewable resources

• the rate of species decline

Most of the species on Earth are

• plants
• animals
• fungi
• insects

Which of the following is an example of a biotic part of the environment?

• wind

• vegetation

• water

• temperature

Which level of biodiversity includes the available different HABITATS found in a certain area?

• Species diversity

• Genetic diversity

• Ecosystem diversity

• All of these

The last great mass extinction  (the one that marked the end of dinosaurs) occurred

• 6500 years ago
• 65,000 years ago
• 650,000 years ago
• 65,000,000 years ago

Some species are so important to the functioning  of an ecosystem that they are called

• keystone species
• cornerstone species
• essential species
• exotic species

Madagascar is a biodiversity hotspot that is the only home to which primate species?

• gorillas
• chimpanzees
• lemurs
• gibbons

A species that is NOT native to a particular region and takes over when it arrives is called

• natural
• invasive

• endemic
• extraordinary

Which of the following describes a species that may soon be gone if nothing is done to save it?

• threatened
• invasive
• endangered
• extinct