1. the process of cleaning up an environment by using live organisms a. erosion b. bioremediation c. eradication d. biodiversity 2. the process of breaking down rock and soil layers with the action of water a. erosion b. bioremediation c. the water cycle d. percolation 3. the variety of organisms able to adapt to various environments on earth a. bioremediation b. specieis c. biodiversity d. collection 4. classified as not living a. endemic b. abiotic c. unique d. biotic 5. the process of passing the liquid through a porous filter, or action of water through the soil. a. the water cycle b. erosion c. percolation d. adaption

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data