Discusses seals in terms of their classification, ecological influences, their pelage, moult and thermoregulation, respiratory and vascular systems, predation and mortality. (JR)

Results of psychological experiments usinganimals are presented. Use of the animal-human analogy to generalize these findings to humans is discussed. Ethological studies are interpreted in light of the total environment and situation involved. The completeness of the ethological model compared to the animal-experimental model is discussed. (LS)

Monkeys with a severe visual acuity deficit were reared in social isolation to determine factors related to sterotyped movements, which have been observed in visually handicapped persons. (Author/MC)

Reviews theories of language origin with particular reference to Morris Swadesh's The Origin and Diversification of Language'', Chicago: Aldine-Atherton, 1971. (RS)

Describes curriculum changes needed in one high school when enrollment zoomed in agriculture. (MU)

Article reviews evidence on the effects of contrast and matching, that these effects are related, and that both effects are reactions to the same independent variable. (Author/RK)

Describes the variety of formal and informal educational programs being developed by zoos and aquariums in the United States and suggests methods of increasing the educational utility of these facilities. (AL)

Substances that deliver chemical messages between same/different species are called semiochemicals. Surveyed are three types of semiochemicals (pheromones, allomones, and kairomones), types of organisms involved, and specific chemicals used to carry the various kinds of messages. (JN)

Provides background information on and development and use of mental imagery exercises in environmental education. The exercises are designed to help people make contact with those symbolic forms which then actualize certain aspects of their personality. (JN)