Both types of star have a special property: Their intrinsic brightness is approximately known, so their distance from Earth can be estimated from their apparent brightness on the sky.
In bacteria, spontaneous base-substitution rates have been estimated by Luria-Delbrück fluctuation tests using selective conditions (Drake 1991; Lynch 2006, 2010 and references therein) and by comparing DNA sequences from lineages with approximately known divergence times (Ochman et al. 1999).
Similarly, New Zealand's 66 species of Antipatharia (black corals) represent about 41% of the approximately 160 species known from the entire Indo-Pacific, and the New Zealand stylasterid (hydrocoral) fauna of 55 species is one of the most diverse in the world.
Extra-pair fertilizations, which can result from females engaging in copulations with extra-pair males (extrapair paternity; EPP), or from males copulating with extra-pair females that lay eggs in the male's nest (extra-pair maternity; EPM or quasi-parasitism, QP) [1], is known from approximately 90% of the avian species (see [2]).
In Denmark M. arion was previously known from approximately 40 localities, but only half of these persisted until the second half of the 20th century [Figure 1b; [ 30]].
Approximately 15 percent of the genera known from the Burgess Shale also occur in the older Chengjian deposit.
Since seven percent of the genome was covered with average 109.5 base pair reads, we expect approximately 37% of the ESTs known from soybean to have hits to the genomic reads.
Due to its high diversity of habitat types, including alpine habitats and lowland stream valleys, Bavaria hosts approximately 90 per cent of the continental species known from Germany [7], 70 per cent of the fauna of Central Europe and about one third of the European fauna.
As known from other experiments, approximately two-thirds of these cells were neurons (based on NeuN expression) and around 15%% were S100β-positive astrocytes.
Of the approximately 80 species in the world, 10 are known from the western Atlantic.
