Below is a list of functions performed by organisms. examine the list, then answer the question that follows. gas exchange intake of nutrients disposal of wastes stimulus response reproduction how do these functions compare between single-celled and multi-celled organisms? a. single-celled organisms can perform all of these functions, while multi-celled organisms can perform only some of these functions. b. single-celled organisms must perform all of these functions with one cell, while multi-celled organisms can have specialized cells for different functions. c. single-celled organisms can perform only some of these functions, while multi-celled organisms can perform all of these functions. d. neither single-celled organisms nor multi-celled organisms can perform all of these necessary functions.

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.