Sentence examples for extant life forms from inspiring English sources
We describe some previously unnoticed domains and the possible evolutionary stages leading to the RNA polymerases of extant life forms.
If this idea is correct, life evolved from a primordial soup containing different organic molecules (many of which are used by extant life forms).
Most hyperthermophiles belong to the domain Archaea, the third domain of life, and are considered to be the most ancient of all extant life forms.
Ten subfamilies show a universal phyletic distribution compatible with presence in the last universal common ancestor of the extant life forms (LUCA).
The first living systems probably did stem directly from the primordial soup and evolved relatively fast up to a common ancestor, usually referred to as Last Universal Common Ancestor (LUCA), an entity representing the divergence starting-point of all the extant life forms on Earth (Fig. 3).
Instead of genetically engineering a desired trait from scratch, as the machine/engineering metaphor promises, researchers are making greater strides by co-opting natural selection to "search" for a suitable genotype, or by borrowing and recombining genetic material from extant life forms.
In a recent, remarkable Letter to Nature, Theobald applied an information-theoretical approach to offer just that: a formal, homology-independent test for the hypothesis of the common ancestry of the extant cellular life forms [ 4], a claim that is further reaffirmed in the accompanying News and Views article by Steel and Penny [ 5].
And he takes that understanding further: we are kin to all organic life forms, extant and extinct.
The difficulty in ascribing true biochemical essentiality to silicon probably emanates from a lack of demonstration of any silicon-requiring biochemistry and specifically Si-C, Si-O-C, Si-N, et c. bonds in any form of extant life [ 2].
We used a variety of methods to assess extant life histories on the two streams.
The scientific aims of the instrument are to detect organics in the form of biomarkers that might be associated with extinct life, extant life or abiotic sources of organics.
