21. Ontogeny , embryology and developmental biology are closely related studies and the terms are sometimes used interchangeably.22. Interest in paleolimnology eventually shifted from esoteric questions of lake ontogeny to applied investigations of human impact. 23. Which end forms first in ontogeny is a criterion used to classify animals into protostome and deuterostome. 24. The research at CCS centers on the phylogeny and ontogeny of human semiosis, employing both child and 25. *" The First Report of South American Edrioasteroids and the Paleoecology and Ontogeny of Rhenopyrgid Echinoderms" 26. This ancestral character state appears only during these early stages, supporting the notion that ontogeny reflects phylogeny. 27. Formerly a taxonomic group of velum ), which is called a gymnocarpic or hemiangiocarpic ontogeny , respectively. 28. The ecology of ontogeny is the study of how ecological relationships change over the lifetime of an individual. 29. Human ethology has contributed in two particular ways to our understanding of the ontogeny of behavior in humans. 30. In addition to changes across ontogeny , the degree to which schreckstoff is produced varies within the breeding season.