The number of currently described species on the planet is about ________.

1. 17,000
2. 150,000
3. 1.5 million
4. 10 million

A secondary plant compound might be used for which of the following?

1. a new crop variety
2. a new drug
3. a soil nutrient
4. a crop pest

Pollination is an example of ________.

1. a possible source of new drugs
2. chemical diversity
3. an ecosystem service
4. crop pest control

Converting a prairie to a farm field is an example of ________.

1. overharvesting
2. habitat loss
3. exotic species
4. climate change

Which two extinction risks may be a direct result of the pet trade?

1. climate change and exotic species introduction
2. habitat loss and overharvesting
3. overharvesting and exotic species introduction
4. habitat loss and climate change

What kind of ecosystem are exotic species especially threatening to?

1. deserts
2. marine ecosystems
3. islands
4. tropical forests

Certain species of parrot cannot be brought to the United States to be sold as pets. What is the name of the legislation that makes this illegal?

1. Red List
2. Migratory Bird Act
3. CITES
4. Endangered Species Act (ESA)

Which measures can protect biodiversity?

1. legal protections
2. conservation efforts
3. restoration efforts
4. all of the above