Biodiversity

What is THE most major cause of extinction today?

• habitat destruction by humans
• poaching
• disease
• hunting

Biodiversity refers to

• extinct species
• the variety of species on Earth
• 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  component of the environment?

• wind
• vegetation
• water
• temperature

Which level of biodiversity includes  the available habitat in an 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 the only home to which primate species?

• gorillas
• chimpanzees
• lemurs
• gibbons

A species that is NOT native to a particular region is called

• natural
• exotic
• endemic
• extraordinary

Which of the following describes a species that  will soon be gone if nothing is done?

• threatened
• invasive
• endangered
• extinct