molecular clock造句
1 However, the origin time inferred by molecular clock is always earlier than that by the fossil record. This approach is still controversial.
2 Their molecular clock data suggest a much earlier speciation, perhaps prompted by the breakup of the ancient supercontinent of Gondwana around 120 million years ago.
3 In particular, they used a molecular clock rate derived from invertebrates, which is slower than the one based on vertebrates.
4 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.
5 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.
6 Knowing that all four strains were at least 10,000 years old, scientists recalculated the virus's "molecular clock,[www.]" measuring how fast it mutates.
7 Geneticists speak of the "molecular clock" that recordsthe passage of time. These molecular data also show how variousorganisms are transitional within evolution.
8 "We can use the mutations as a molecular clock, " said Markowitz.
9 Molecular clock gives a line of evidence independent of fossil records in telling some early evolutionary events.
10 Conclusions - Key components of the molecular clock regulate the response to a thrombogenic stimulus in vivo.
11 They then used a so-called "molecular clock" technique to put dates on the evolutionary story of rice.
12 In this issue, Yue's article ( p. 56 ) briefly reviewed the 40 year development of molecular clock hypothesis and introduces several cases in which molecular clock gives satisfactory explanations.
13 Using the genetic differences between today's living things as a molecular clock, we can calculate when that ancestral cell first emerged: about 3.5 billion years ago.
14 Although genes relevant to hemostasis and vascular integrity undergo circadian oscillation, the role of the molecular clock in thrombotic events remains to be established.
15 "This virus most likely has been circulating under the radar in pigs for the better part of 10 years," Worobey, who specializes in tracking viruses using a so-called molecular clock, told the meeting.
16 By using a data set comprising mitochondrial genomes from 177 humans, we estimate substitution rates for various data partitions by using Bayesian phylogenetic analysis with a relaxed molecular clock.
17 Based on genetic distances, molecular evolution rates established by the hypothesis of molecular clock can be used to deduce the origin or divergence time of different organism taxa.