E-o Crossword
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
 
 
Down: 1) a segment of DNA that determines a trait2) a living thing whose cells contain a nucleus3) the organ system that removes waste from the body4) a protein that speeds up a chemical reaction6) a model that shows a decrease in the amount of energy available at each successive level of a food chain7) a scientific investigation that takes place in anatural setting10) a model of the overlapping food chains in an ecosystem14) a period of geologoc time that begins after a mass extinction and that lasts ten or hundreds of millions of years17) the preserved imprint or remains of an organism Across: 2) the death of all members of a species5) a model that shows the transfer from one organism to another8) the genes the genes an organism carries9) change over time11) the process in which sperm cell unites with an egg cell12) female sex cell13) a muscular tube that connects the mouth to the stomach.15)  a biological kingdom made up only of bacteria16) a kingdom of organisms made up of both single-celled and multicelled heterotrophic eukaryotes, including many decomposers18) the organ of the female reproductive system system that transports eggs from ovary to the uterus19) all the organisms in an area and their relationships with each other and with the nonliving materials in the environment
 

 

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