Term
|
Definition
The variety of life on Earth. |
|
|
Term
What are the three sections to biodiversiy? |
|
Definition
Species diversity, ecosystem diversity, and genetic diversity. |
|
|
Term
What is species diversity? |
|
Definition
All living things on Earth and their species. |
|
|
Term
What is ecosystem diversity? |
|
Definition
All of the habitats on Earth. |
|
|
Term
How many species are there? |
|
Definition
About 10 million - 300 million |
|
|
Term
What is genetic diversity? |
|
Definition
The genetic variation present in a population or species. |
|
|
Term
What does genetic diversity help? |
|
Definition
Safeguard against future problems (diseases or natural disasters). |
|
|
Term
True or false, loss of biodiversity is one of our most urgent environmental problems? |
|
Definition
|
|
Term
When human population increases, biodiversity ___________. |
|
Definition
|
|
Term
How do invasive species affect biodiversity? |
|
Definition
They reproduce quickly and spread in large area, using lots of natural resources. |
|
|
Term
What are some ways that invasive species get introduced to Pennsylvania? |
|
Definition
Dumping aquarium plants, waterways, various imported products. |
|
|
Term
|
Definition
The state of equilibrium with our environment. |
|
|
Term
What was the "Endangered Species Act of 1973" and who was the law signed by? |
|
Definition
It was a law designed to protect critically imperiled species from extinction. It was signed by President Nixon |
|
|
Term
How many threated and endangered animals and plants are there in the United States. |
|
Definition
481 - animals 795 - plants |
|
|
Term
What does endangered mean? |
|
Definition
A species that is in imminent danger of extinction or extirpation throughout the range of Pennsylvania. |
|
|
Term
What does threatened mean? |
|
Definition
A species that may become endangered within the foreseeable future throughout the range of Pennsylvania. |
|
|
Term
What does extirpated mean? |
|
Definition
A species that has disappeared from Pennsylvania, bit still exist elsewhere. |
|
|
Term
|
Definition
A species that occurred in Pennsylvania, but no longer exists. |
|
|