1which is a cyclic behavior of movement from one environment to another? a migration b hibernation c imprinting d conditioning 2 an opossum is an animal that is known to "play dead” when threatened by other animals. this is an example of a response to which kind of stimulus? a the external stimulus of tiredness b the internal stimulus of illness c the external stimulus of danger d the internal stimulus of predators 3 which is an example of an instinct? a rabbit hides when it observes a predator. b dog wags its tail when it hears a doorbell ring. c boy pulls his hand away after touching a hot surface. d dolphin swims through a hoop during an amusement park show.

9. the history of life on earth is recorded in

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.

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?