в словаре PONS
di·rec·tion·al [dɪˈrekʃənəl] ПРИЛ. неизм.
1. directional РАДИО:
2. directional (in fashion):
se·lec·tion [sɪˈlekʃən, америк. sə-] СУЩ.
1. selection no pl (choosing):
2. selection no pl:
3. selection usu ед. (range):
4. selection (set of selected extracts):
Klett Словарь биологических терминов
directional selection
PONS OpenDict
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Одноязычные примеры (не проверены редакцией PONS)
It is directional selection that is illustrated in the antibiotic resistance example above.
en.wikipedia.org Directional selection occurs when a certain allele has a greater fitness than others, resulting in an increase of its frequency.
en.wikipedia.org Neurological and developmental differences lead to directional selection and changes in the set of foraging behaviors between generations of honey bees.
en.wikipedia.org If pollinators selectively visit a particular morph, this will cause this morph to increase in frequency, and may ultimately lead to the fixation of this phenotype, known as directional selection.
en.wikipedia.org Because the main cause for directional selection is different and changing environmental pressures, rapidly changing environments, such as climate change, can cause drastic changes within populations.
en.wikipedia.org