Green sea turtles eat sea grass that grows on the sea floor. sea grass, a foundation species, provides an important breeding ground for fish and other marine organisms. a conservation program for the green sea turtles plans to introduce more turtles into an ecosystem. what could be the immediate effect of this on the ecosystem? a) more species of fish would migrate to the region. b) the new turtles would drive out the existing population. c) the region would witness a spurt in the growth of sea grass. d) there would be a decrease in the population of marine organisms.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.