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82457acb1a Please select the sections you want to printSelect All Table of contents Introduction Types and rates of human growth Types of growth data Development at puberty Hormones and growth Cancel . Acquisition of data: Susman, Steinberg, Belsky, Cauffman, and DeHart. Next: Creating a Custom Course Create a new course from any lesson page or your dashboard. doi: 10.1001/archpediatrics.2009.261PMCID: PMC2863107NIHMSID: NIHMS192463Longitudinal Development of Secondary Sexual Characteristics in Girls and Boys Between Ages 9 and 15 YearsElizabeth J. J Appl Dev Psychol. ^ Manwatching: A Field Guide to Human Behaviour, 1977, Desmond Morris ^ Lloyd, Jillian (May 2005).
Characteristics due to mate choice, often referred to as ornaments, include brighter plumage, coloration, and other features that have no immediate purpose for survival or combat. bird's plumage). Little RJA, Rubin DB. 1970;45(239):1323. Tatiana's Sex Advice to All Creation: Definitive Guide to the Evolutionary Biology of Sex. Keep it up! Go to Next Lesson Take Quiz 20 You've just watched 20 videos and earned a badge for your accomplishment! Go to Next Lesson Take Quiz 50 You've just earned a badge for watching 50 different lessons. The female may also be more colorful, though in the insect world, it can go either way. A secondary goal was to investigate whether racial differences in pubertal timing and change are accounted for by family socioeconomic status.