The skin is the body's largest organ. it's made up of many different types of cells. oils, produced by the sebaceous glands, prevent the skin from drying and splitting. the pigment melanin, produced by melanocytes in the epidermis, protects the skin from the harmful effects of ultraviolet radiation. sweat, released through ducts to the skin surface, to cool the body. the types of cells that produce these compounds have different numbers of specific organelles, depending on their function. melanocytes use many enzymes to produce melanin. based on their function, you would expect melanocytes in the skin to have a higher than usual number of

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.