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a type of plant that produces seeds inside cones. these plants are well adapted for living in the taiga
the tallest layer of trees in a forest. these are the mature trees that receive the most sunlight
the bushes and shrubs in a forest. their density determines if the forest is called a "jungle"
the dead material on the floor of the forest. it replenishes the nutrients in the soil as it decomposes
the widening of a tree's trunk that serves to stabilize the tree and keep it upright. this occurs when a tree's roots do not extend down deep enough to stabilize the tree
a long period of inactivity inside a seed. when the conditions improve the seed will come out of dormancy and sprout
when an animal is only active at night. this protects the animal from dehydrating during the day.
a waterproof chemical that covers the surface of the skin. it protects an animal from dehyrdating
the gradual change of a biome into a desert. this is often a result off human activities
a region where deep, nutrient rich water is brought to the surface by offshore winds
this region along the shoreline is under water during high tide and out of the water during low tide. this zone is commonly called beach
the lowest region of the pelagic zone characterized by very cold temperature and high pressure
aquatic, single celled photosynthetic organisms that forms the basis of the food chain
aquatic, single celled organisms that can not perform photosynthesis. they are heterotrophic
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