Biodiversity and its Threats

Biodiversity refers to

• extinct species

• the variety of species on Earth

• nonrenewable resources

• the rate of species decline

1. What makes a species invasive?

• Moving to a new ecosystem and taking resources from natives 

• Not having papers

• Species that can't adapt

• Plants that take up too much space

If a blue catfish is introduced and eats the large fish who eat the smaller fish, what will happen to the population of the smaller fish?

• Increase

• Decrease

• Stay the same

• No affect on smaller fish

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 

• Invasive species are prey to many animals.

• Invasive species have no predators.

• Invasive species keep the ecosystems in equilibrium.

What are the greatest problems facing plants, animals, and people?

• introducing new species that  can cause problems 

• habitat destruction

• illegal hunting 

• all of the above

The number of different species in an area is referred to as its _______________.

• population

• genetic diversity

• biodiversity

• Niche diversity

What is the variety of genes present?

• bidiversity

• species diversity

• extinction

• genetic diversity

The number of different species and the abundance of each species in a biological community.

• genetic diversity

• ecosystem diversity

• extinction

• species diversity

the breaking of habitats into smaller pieces is called...

• habitat division

• habitat pollution

• habitat corruption

• habitat fragmentation

Climate change is predicted to have an impact on Earth's biodiversity. What could be a consequence of climate change on marine biodiversity?

• An increase in the temperature of the ocean may cause bleaching of corals, thus dramatically reducing biodiversity

• An increase in the temperature of the ocean will cause coastal wetlands to shrink, thus decreasing biodiversity

• An influx of fresh water as the ice caps melt will increase salinity of the ocean, thus eliminating species sensitive to changes in salinity

• An increase in atmospheric temperature will cause a significant increase in evaporation from the ocean, thus lowering sea levels around the globe and limiting viable habitats for marine organisms.