Rachel Bilson Long Wavy Highlighted Hairstyle for travel germ theory the doctrine that infectious diseases are caused by the presence and activity of microorganisms, such as bacteria, viruses, or fungi, in body tissues. geront- (gero-) combining form old age. gerontology n. the scientific interdisciplinary study of old age and the aging process. Those involved in gerontology include psychologists, biologists, sociologists, medical scientists, medical practitioners, geriatric service providers, and scholars from the humanities and social sciences. See also social GERONTOLOGY. gerontological adj. Rachel Bilson Long Wavy Highlighted Hairstyle 2016.
Jessica Alba Cute Messy Updo with Side Swept Bangs for travel mutations in body cells), are transmitted to offspring and may predispose the offspring to disease or other traits. germ plasm 1. the region of cytoplasm in an egg cell that is destined to give rise to the GERM CELLs during subsequent embryological development. Compare somatoplasm. 2. the hereditary material that, according to German cytologist August Weismann (1834-1914) in his germ plasm theory (also known as continuity of germ plasm or Weismannism), passes unchanged from generation to generation in the germ cells. It is now identified as DNA. Jessica Alba Cute Messy Updo with Side Swept Bangs 2016.
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