molecular clock

基本解釋

However, the origin time inferred by molecular clock is always earlier than that by the fossil record. This approach is still controversial.
然而，利用分子鐘方法所得出的不同門類起源時(shí)間總是早于化石記錄，因此分子鐘與化石記錄的矛盾仍十分突出。
But what has made this molecular clock so useful for forensic anthropologists over the past quarter-century is the fact that it stops dead when someone dies.
但為何這個(gè)分子時(shí)鐘在過去四分之一世紀(jì)中對(duì)于法醫(yī)學(xué)家如此有用呢？究其實(shí)是因?yàn)槟橙怂廊r(shí)它突然停止，凝滯了死亡瞬間。
As a molecular clock and genetic marker, superoxide dismutase has been widely used in evolutionary studies, population genetics, and identification of different strains in the same species.
因此，超氧化物歧化酶作為分子鐘或分子標(biāo)記已被廣泛應(yīng)用于生物進(jìn)化研究、群體遺傳結(jié)構(gòu)分析以及品系鑒定。

Ptacek and his colleagues foresee ways in which understanding the molecular action of PTCy could lead to new ways to control the food clock and regulate metabolism despite shifts in the timing and amount of calories ingested.
FORBES: Holiday Overindulgence Got You Down? Blame Your 'Food Clock'

分子鐘
Molecular clock and megafossil bearing reproductive features indicate remarkable discrepancy on minimum age of Ephedra L. Three different explanations at least are present on the conflicts:Paleogene bottleneck,extinction of ancient lineages,and frequent gene exchanges in the genus.
利用分子鐘對(duì)麻黃屬起源時(shí)間的估測(cè)和基于帶有生殖特征的大化石標(biāo)定的最小起源時(shí)間有很大的差距,分子鐘估測(cè)麻黃屬起源于古近紀(jì)的漸新世,而大化石則標(biāo)定麻黃屬起源不晚于早白堊世巴列姆期。麻黃屬化石和分子鐘結(jié)果之間的沖突至少有三種不同的解釋:即古近紀(jì)瓶頸、古老支系緩慢絕滅和頻繁的基因交流減緩了分子進(jìn)化速率。
農(nóng)業(yè)科學(xué)
分子鐘
As a molecular clock and genetic marker, superoxide dismutase has been widely used in evolutionary studies, population genetics, and identification of different strains in the same species.
因此，超氧化物歧化酶作為分子鐘或分子標(biāo)記已被廣泛應(yīng)用于生物進(jìn)化研究、群體遺傳結(jié)構(gòu)分析以及品系鑒定。
天文學(xué)
分子鐘