Biodiversity

In an ecosystem there are species that have an unusually large effect on an ecosystem due to behavior patterns and their feeding habits. These species are known as _______  _________.

• Invasive species

• Biodiverse species

• Exotic species

• Keystone species

The Joshua Tree (shown in the picture below) is in the Mojave Desert and is found no where else in the world. This is an example of a(n) _______ species, which is limited to its native region.

• endemic

• invasive

• indicator

• keystone

The level of biodiversity that involves a variety of habitats and communities is

• population diversity

• ecosystem diversity

• genetic diversity

• species diversity

These areas are the most threatened areas with high levels of diversity and are a home to a large number of endemic species. Some examples include tropical rainforests, coastal areas, and islands. 

• endemic areas

• succession regions

• biodiversity hotspots

• fragmented areas

Germ-plasm banks are unique because they focus on

• saving individual organisms

• storing genetic material

• preserving animal populations

• reintroducing extinct species

When the relative abundance of an organism is used to determine the overall health of an environment, that organism is referred to as a(n)

• Indicator species

• Invasive species

• Endemic species

• Abundance species

Species evenness is defined as...

• the number of different species represented in an ecosystem.

• the extent to which number of individuals of different species are equal or skewed

• the effect that losing a keystone species has.

• the conservation of plant and animal genetic material.

The current mass extinction event, unlike the past mass extinction events, is primarily driven by:

• A natural increase in global volcanic activity.

• A complete stop to species evolution.

• Human activites that disrupt ecosystems and cause climate change.

• A change in Earth's rotation and the length of day

Which of the following is an example of primary succession?

• A forest fire destroys the majority of trees and plant species but leaves behind the seeds and roots.

• A heavy flood during an El Nino year ruined the farmlands, the crops have been destroyed.

• A population of plants has been attacked by an invasive species, the area has been destroyed.

• A volcanic eruption has occurred, and the lava has flowed into the oceans and created a new land.

What piece of legislation includes the requirements listed below?

• Endangered Species Act

• The U.S. Fish and Wildlife Act

• International Union for the Conservation of Nature

• The Convention on International Trade in Endangered Species