9th Grade Biology Eoc Review Questions And Answers 100% Verified A+ Guaranteed

why is acid rain becoming a larger problem over time {Ans: the increase in the use of fossil fuels creates pollution in the air which can get caught in the water cycle, developing acid rain which damages properties and ecosystems.}scientific method {Ans: 1. Observe 2. Form a hypothesis 3. Test the hypothesis 4. Analyze the data 5. Form a conclusion}primary succession {Ans: the establishment and development of an ecosystem in an area which was previously uninhabited. (rebuild soil)}active transport {Ans: energy is needed move AGAINST concentration gradient (from LOW TO HIGH) when large molecules move in and out of cell Proteins used to "pump" Large subs. cross membrane through vesicles (membrane bound sacs)}If populations of an indicator species a (keystone) are increasing, then {Ans: the ecosystem is very healthy.}eukaryotes {Ans: have a nucleus and other membrane-bound organelles, may be either single or multi-celled organisms, nucleus encloses genetic material.}