resources that are naturally replaced in a relatively short period of time
What is a renewable resource?
100
is the practice of raising fish and other water-dwelling organisms for food
What is aquaculture?
100
biodiversity has both of these values
What are economic value and ecological value?
100
the breaking of larger habitats into smaller, isolated pieces
What is habitat fragmentation?
100
this was originally made from the bark of a willow tree
What is aspirin?
200
resource use, population growth, pollution
What are the three main types of environmental issues?
200
this is why trees can be considered a renewable resource
What is new trees can be planted to replace trees that are cut down?
200
these factors affect biodiversity in an ecosystem
What are area, climate, and diversity of niches
200
extinction
What is the disappearance of all members of a species from Earth?
200
true or false, scientists have identified all wild plants that have medical uses
What is false?
300
the study of the natural processes that occur in the environment and how humans can affect them
What is environmental science?
300
these are two ways to manage fisheries for the longterm
What are setting fishing limits, changing fishing methods, finding new resources
300
the structures in an organism’s cells that carry its hereditary information
What are genes?
300
species that could become endangered in the near future
What are threatened species?
300
this is the adaptation of rainforest plants that make them a source of medicines
What is some chemicals that rainforest plants produce to protect their leaves and bark from predators, parasites, and diseases can also be used to fight human diseases?
400
the belief that people should use resources from the environment as long as they do not destroy those resources
What is the conservation viewpoint?
400
this is a benefit and a cost of clear cutting
What is
benefits -- cheaper, safer for loggers, quicker
costs -- more damaging to forest, lose all trees in the area, changes ecosystem, exposes soil to wind & rain, lose topsoil
400
a species that influences the survival of many other species in an ecosystem
What is a keystone species?
400
the mating of animals in zoos or wildlife preserves, especially done for severely endangered species
What is captive breeding?
400
In 1995, the American Medical Association called for the protection of biodiversity due to this factor.
What is to preserve medicines that may exist in nature?
500
cutting down trees has this cost and this benefit
What is
costs -- changes environment, loss of habitats, clears land - topsoil lost, carbon dioxide released in air
benefits -- jobs for loggers, trees for building, clears land
500
this is a regular amount of a renewable resource such as trees that can be harvested without reducing the future supply
What is sustainable yield?
500
human activities that can threaten biodiversity include
What are habitat destruction, poaching, pollution, and introduction of exotic species.
500
this is why DDT was so harmful to birds like eagles and falcons
What is the fact that it weakened the egg shells, so baby birds could not mature before hatching?
500
the chemical substance that protects the Pacific yew tree and is being tested as a potential treatment for cancer patients.