Sustaining Biodiversity

The largest use of wood harvested each year

Which of these is a toothed whale?

The main reason for the removal of Asian rainforests

The increase in fat-soluble toxins in organisms at successively higher trophic levels

Which commercial fishing practice is shown in the diagram?

The first national park was

A fire that is deliberately-set with the goal of removing leaf litter to prevent larger fires

Nile Perch were introduced to

Which North American bird went extinct in the year 1900 because of over-hunting?

The biggest threat to honeybees is believed to be

The practice of moving cattle from one location to another to allow grass time to recover

The vegetated banks of a river or stream

What was believed to be the cause of the decline of the California Condor?

Polar bears hunt seals

The Nile Perch preyed heavily upon which native species?

Which commercial fishing method involves fishing line set with numerous baited hooks?

A rapidly-growing vine introduced to the U.S. from Japan to control erosion.

Which organism would have the highest concentration of fat-soluble toxins in its tissues?

The dividing of natural habitat (by roads, crop fields, or logging operations, for example)

Rhinos are poached for their

Which commonly-discarded item do sea turtles notoriously mistake for food?

Which of these is an international agreement that protects endangered species?

The organization that established quotas for the international harvesting of whales was the

Water used to stabilize cargo ships

Which animal was systematically removed from Yellowstone and then reintroduced in 1995

What is this bird whose population size in the wild was once just 21 individuals?

The main reason for the removal of the Brazilian rainforest

The most significant threat to Earth's species is

The only warm-blooded species of sea turtle is the

The number of past mass extinctions on earth is

The organization that is the global authority on the status of endangered species is

The author of Silent Spring is