- 産業: Biology
- Number of terms: 15386
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Terrapsychology is a word coined by Craig Chalquist to describe deep, systematic, trans-empirical approaches to encountering the presence, soul, or "voice" of places and things: what the ancients knew as their resident genius loci or indwelling spirit. This perspective emerged from sustained ...
Группы атомов, Соединенных вместе. Химия-это научное изучение молекулярных реакций.
Industry:Biology
Плоский тропический или субтропический лугов с иногда кустарники, травы и деревья.
Industry:Biology
Сахара состоят из моносахариды (простые сахара). Примеры: сахароза и лактоза.
Industry:Biology
От греческого oikos (бытовые) и logos (изучение): изучение взаимосвязи между организмами и окружающей их средой. Термин был введен в 1866 году немецкий зоолог и философ Эрнест Геккель, известен также его дискредитировали но интересный афоризм, что Онтогенез (индивидуальное физическое развитие) резюмирует филогении (эволюционного развития его видов).
Industry:Biology
A daptive changes in the genetic characteristics of a population over time--but this adaptation is not necessarily “improvement.” This entry says "Evolution" and not "Evolutionary Theory" because evolution is not a theory anymore. Evolutionary operations and outcomes have been observed directly, today, as well as indirectly through field studies, DNA research, evidence-dating techniques, the fossil record, etc. The animal equipped with a new and helpful feature is likelier to live long enough to pass it down than an animal without it.
Elephants in China are more frequently born tuskless, now, due to pressure from poaching. See Speciation for an example of a family of Asian butterflies branching into different species today. Genetic mutations, which are rare and usually harmful, play less of a role in evolution than Darwin believed, and cultural forces that reinforce selection for certain characteristics a larger role. (See Natural Selection and Sexual Selection.) According to biologist Richard Dawkins, the eye has evolved independently at least forty times, echo location four times, the venomous sting ten times, electrolocation several times, flapping flight four times, jet propulsion twice, and sound production for social purposes too many times to count. See Convergent Evolution, Taxonomy.
Industry:Biology
A form of nucleic acid organized into pairs of double-helix molecules packaged into chromosomes carrying the genetic code. The molecules are made of linked nucleotides units with a sugar, a phosphate, and one of four base chemicals adenine, thymine, guanine, and cytosine. These bases join like ladder rungs--always an A to a T and a C to a G--with the sugar-phosphate forming the outside "backbone" of the strand. The sequence of these nucleotides, with each group of three spelling one anino acid "codon," determines the kind of protein manufactured when translated by strands of RNA. (James Watson and Francis Crick discovered this structure in 1953.) RNA also aids in DNA's replication. Everything living carries the same gene code, one reason scientists are so confident we are all related biologically. Some DNA sequences are identical in humans and bacteria, a fact that underlines our common biological origins.
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Industry:Biology
Генетическая изменчивость, найденных в популяции из-за генетических комбинаций его лиц.
Industry:Biology
Взятые вместе, тропосферы, океаны и поверхности земли, где живут вещи. Также называется экосферы.
Industry:Biology
Распад нестабильных ядра атома, случайные потери протонов, нейтронов или фотонов (радионуклида).
Industry:Biology
Понос производителей кишечная бактерия, которая вызывает тифа и отравляет сырого молока, яиц, мяса и птицы.
Industry:Biology
