Biodiversity and Extinction Quiz Ch. 11.3 17-18

How do you determine the level of biodiversity in an ecosystem? 

• Look at the number of houses in an ecosystem.
• Look at the number of plants in an ecosystem.
• Look at the number of non-living things in an environment. 
• Look at the total number of different species in an environment. 

Which of the following describes a species that  will soon be gone if nothing is done?

• threatened
• invasive
• endangered
• extinct

What is THE most major cause of extinction today?

• habitat destruction by humans
• poaching
• disease
• hunting

Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

______________________ are the most diverse ecosystems in the world.

• tropical rain forests
• coral reefs
• grasslands
• urban areas

Factors that affect biodiversity are?

• area
• climate
• genetic and niche diversity
• all of the above

How will area affect the diversity of an ecosystem?

• a small area will have more species
• a small area will have more genetic diversity
• a large area will have more species
• a large area will have less genetic diversity

Populations with high diversity have _________.

• very few traits
• high number of different traits
• difficulty surviving
• very few living individuals

Populations with low genetic diversity are more likely to ______________.

• go extinct
• adapt to their environment
• posses a wide variety in traits
• have an advantage over living things with high genetic diversity

When all the members of a species are no longer living, that species is considered _______________.

• extinct
• hybernating
• returning soon
• genetically diverse