Extinction is the complete disappearance of a species from Earth. Select from these resources to teach your classroom about this subfield of evolutionary biology.Heredity, or the passing of characteristics from one generation to the next, is a concept that humans have used for thousands of years as we’ve cultivated crops and selectively bred animals. Pesticides can be fungicides (which kill harmful fungi), insecticides (which kill harmful insects), herbicides (which kill harmful plants), or rodenticides (which kill harmful rodents. The last ice age peaked about 20,000 years ago. The fossil record reveals five uniquely large mass extinction events during which significant events such as asteroid strikes and volcanic eruptions caused widespread extinctions over relatively short periods of time. Unlike many endangered species, there are still more giant pandas in the wild than there are in zoos. What if we lose hundreds? Species become endangered for two main reasons: loss of habitat and loss of genetic variation.deformity or condition different from the normal or expected state of being.to adjust to new surroundings or a new situation.the strategy of applying profit-making practices to the operation of farms and ranches.the art and science of cultivating land for growing crops (farming) or raising livestock (ranching).science of the origin, development, and culture of human beings.geographic area where a specific population of a species resides, used to determine a species' level of conservation.irregularly shaped planetary body, ranging from 6 meters (20 feet) to 933 kilometers (580 miles) in diameter, orbiting the sun between Mars and Jupiter.layers of gases surrounding a planet or other celestial body.having to do with the bottom of a deep body of water.large predators, including tigers, lions, jaguars, and leopards.place where plants and flowers are grown and displayed for education and study.animals who cooperate over a period of time to produce generations of offspring.to reach a conclusion by mathematical or logical methods.one of the top layers of a forest, formed by the thick leaves of very tall trees.large farm where cattle are raised and bred for meat or leather.game of strategy played by two players, each with 16 pieces moved across a checkered board.to identify or arrange by specific type or characteristic.all weather conditions for a given location over a period of time.gradual changes in all the interconnected weather elements on our planet.wooded area, usually high-altitude, almost always covered by clouds and fog.edge of land along the sea or other large body of water.management of a natural resource to prevent exploitation, destruction, or neglect.international treaty to sustain and protect the diversity of life on Earth.145 million to 65 million years ago. Today, the field of genetics is breaking new ground searching for new ways to treat disease or develop crops more resistant to insects or drought.
The Rights Holder for media is the person or group credited. (dichloro-diphenyl-trichloroethane) toxic chemical used as an insecticide but illegal for most uses in the U.S. since 1972.remains of something broken or destroyed; waste, or garbage.construction or preparation of land for housing, industry, or agriculture.very large, extinct reptile chiefly from the Mesozoic Era, 251 million to 65 million years ago.animal that has been tamed for work or to be a pet.to make something appear small by having it appear next to something much larger.tree native to Africa that produces dark, hard timber.irregular, recurring weather system that features a warm, eastern-flowing ocean current in the eastern Pacific Ocean.smallest area that could contain all the sites of a species' population, used to determine a species level of conservation.highest level of conservation of a living species, when the only living members of that species are protected in captivity such as zoos or aquariums.process of complete disappearance of a species from Earth.nutrient-rich chemical substance (natural or manmade) applied to soil to encourage plant growth.to punish, usually by charging an economic penalty or fee.
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endangered species song