Chapter 7 Test Review

Invasive species can outcompete and displace ________ species.

Harmful chemicals and materials that make their way into habitats can __________ people and wildlife.

Taxonomists classify species into a hierarchy of __________ groups.

Biodiversity includes three types: Genetic diversity, __________ diversity, and Ecological diversity.

The increase in species richness toward the equator is known as __________ gradient.

Intact environments provide ecosystem services such as water purification, access to unique resources, and __________ control.

Siberian tigers were once reduced to just 20-30 individuals due to hunting and __________ loss.

The primary cause of population decline in more than 80% of threatened birds and mammals is __________.

• a. Picnics

• b. Habitat change or destruction

• c. Forest fires

• d. Overharvesting

What are the three types of biodiversity?

• Animal, plant, and fungi diversity

• Mammal, bird, and reptile diversity

• Tropical, temperate, and polar diversity

• Genetic, species, and ecosystem diversity

The "hotspot approach" focuses on areas where the greatest number of species can be protected with __________ effort.

• No

• Minimal

• Moderate

• Maximum