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natural selections and biomes

species A group of similar organisms that can mate with each other and produce fertile offspring
adaptations A trait that helps an organism survive and reproduce.
evolution The gradual change in a species over time
scientific theory A well tested concept that explains a wide range of observations.
natural selection The process by which organisms that are better adapted to their environment are more likely to survive and reproduce than other organisms
variations Any difference between individuals of the same species.
gradualism Evolution occurs slowly but steadily.
tundra The coldest of all the biomes. It is located in the arctic circle. Winter temps are around -50 degrees fahrenheit.
taiga located near the top of the world, just below the tundra biome. The winters are very cold with only snowfall. The summers are warm, rainy, and humid
deciduous forest found in the eastern half of North America, and the middle of Europe. The average annual temperature is 50° F. The average rainfall is 30 to 60 inches a year.
rainforest a forest of tall trees in a region of year-round warmth. An average of 50 to 260 inches of rain falls yearly. Belongs to the tropical wet climate group. The temperature rarely gets higher than 93 °F (34 °C) or drops below 68 °F
grassland is a region where the average annual precipitation is great enough to support rolling terrains of grass, and in some areas a few trees.
desert warm throughout the fall and spring seasons and very hot during the summer. the winters usually have very little if any rainfall. Animals are usually nocturnal carnivores.
terrestrial Pertaining to land or Earth. Living on land.
population the total of individuals or organisms living in an area or environment
Instinct Innate behaviors organisms exhibit to survive in their environment. Behaviors organisms are born with and not taught. e.g. bears hibernating, birds migrating, babies turning their head when something is placed on their jaw
behavioral adaptations Things organism do to survive in their environment. Activities that help an animal survive. Can be learned or instinctive. e.g. horses' ability to stand while sleeping, geese fly south in the fall, opossums play dead, preditors ability to hunt.
structural adaptations physical features of an organism like the bill on a bird, the fur on a bear, or thick leaves on a plant
extinct No members of that species is still living
niche refers to the role an organism plays in its environment