Which population is most likely to be in hardy-weinberg equilibrium?
a) a large population of ocean fish that lives in an unpolluted ecosystem that has abundant food
b) a large population of prairie grasses that lives in an ecosystem that is frequently burned by wild fires
c) a medium-sized population of birds that lives on a chain of islands that have different food sources
d) a medium-sized population of bacteria that lives on crop plants that are frequently sprayed with pesticides

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.