| A | B |
|---|
| The number of different species on Earth is called _____. | species diversity |
| The sum total of the genetically based variety of different organisms on Earth is called ___. | biodiversity |
| A type of organism that is in danger of extinction is called ___. | an endangered species |
| An insecticide that causes more and more harm as it is ingested and travels up the food chain is _____. | DDT |
| The process whereby a nonbiodegradeable nondigestible substance (like DDT or mercury) becomes more and more concentrated in the flesh of animals higher and higher on the food chain is called _____. | biomagnification |
| The single greatest threat to biodiversity is _____. | habitat destruction |
| The sum total of all the different genes that make up different traits in organisms on this planet is described by ____ | genetic diversity |
| Areas where habitats and species are in the greatest danger of extinction are known as _____. | ecological hot spots |
| A branch of biology that is involved with protecting habitats, managing natural resources and enforcing environmental laws is _____ biology. | conservation |
| A foreign species that is introduced into an ecosystem and threatens the survival of species that are native to the area is called ___. | an invasive species. |
| Which level of the food chain is at the greatest risk from harmful substances that undergo biological magnification? | The highest levels (ex- top predators) |
| What are three benefits of preserving biodiversity? | All the different types of organisms on Earth have provided human with food, medicines and industrial products. Extinction of species would lessen these benefits. |
