Encyclopedia of Biology

born in Danzig, Germany (now Gdansk, Poland), in 1686, the oldest of five children. Fahrenheit’s major contributions lay in the ...

the hottest or coldest day of the year, like the Floren- tine models. Mercury also had a much wider tempera- ture range than alc ...

amphibians, and aquatic and nonaquatic invertebrate animals, and all such wild animals’ eggs, larvae, pupae, orother immature st ...

fertilization The combining of two gametes from different sexes to form a zygote, e.g., the penetration ofsperm into the egg and ...

strength, and mechanical support to plant structure. Also part of sclerenchyma tissue, which is thickened cell walls of lignin, ...

fight-or-flight reaction The reaction in the body when faced with a sudden and unexpected threat or stress. The reaction is imme ...

added. He was a member or honorary member of numerous societies in Scandinavia, Iceland, Russia, and Germany. He received a Dani ...

free-living flatworms (Turbellaria), and it is estimated that more than 20,000 species exist. Millions of humans are host to the ...

succeeded to the Joseph Hunter Chair of Pathology at the University of Sheffield. In1935 he became professor of pathology and a ...

4-oxopteridin-6-ylmethylamino) benzoic acid (pteroic acid) and conjugated with one or more L-glutamate units. Folate derivatives ...

tohave a photograph taken of the catheter lying in his right auricle. He abandoned cardiology after being ridiculed for this act ...

December 17, 1928, in Rochester, New York, to Edwin C. Fritts, a physicist at Eastman Kodak Compa- ny, and Ava Washburn Fritts. ...

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gall (hypertrophies) An abnormal swelling, growth, or tumor found on certain meristematic (growing) plant tissues caused by anot ...

and books in the fields of travel and geography, anthro- pology, psychology, heredity, anthropometry, statistics, and more. Twen ...

35,000 living species, and about half that number in the fossil record. Most gastropods travel by using a large flattened muscul ...

coding segments (EXONs). Functionally, the gene is defined by the cis-transtest that determines whether independent MUTATIONs of ...

genetic drift 141 DNA mRNA transcription mature mRNA mRNA transport to cytoplasm translation nuclear membrane ribosome tRNA codo ...

instead of being shaped by natural selection in a non- random way. Especially prevalent in small populations, where a particular ...

genomic imprinting Occurs when DNA receives biochemical marks instructing a cell how and when to express certain genes. Resultin ...