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How do you account for the origin of life on Earth?
How did life originate?
Where did biotic life come from?
How did life evolve?
The study of the origin of life. Spontaneous generation; The death of spontaneous generation; The origin of primordial life; Biological expeditions; The development of cell theory; The theory of evolution; The study of the reproduction and development of organisms. Preformation versus epigenesis; The fertilization process; The study of heredity
The origin of life is a result of a supernatural event—that is, one irretrievably beyond the descriptive powers of physics, chemistry, and other science. Life, particularly simple forms, spontaneously and readily arises from nonliving matter in short periods of time, today as in the past.
In biology, abiogenesis (from Ancient Greek ἀ- (a-) 'not', βῐ́ος (bíos) 'life', and γένεσις (génesis) 'origin'), or the origin of life, is the natural process by which life has arisen from non-living matter, such as simple organic compounds.
May 15, 2022 · 18.9: The Origin of Life. Page ID. John W. Kimball. Tufts University & Harvard. To account for the origin of life on our earth requires solving several problems: How the organic molecules that define life, e.g. amino acids, nucleotides, were created.
- Simple organic molecules were formed. Simple organic molecules, similar to the nucleotide shown below, are the building blocks of life and must have been involved in its origin.
- Replicating molecules evolved and began to undergo natural selection. All living things reproduce, copying their genetic material and passing it on to their offspring.
- Replicating molecules became enclosed within a cell membrane. The evolution of a membrane surrounding the genetic material provided two huge advantages: the products of the genetic material could be kept close by and the internal environment of this proto-cell could be different than the external environment.
- Some cells began to evolve modern metabolic processes and out-competed those with older forms of metabolism. Up until this point, life had probably relied on RNA for most jobs (as described in Step 2 above).
May 9, 2018 · Moreover, if the route from chemistry to biology proves simple to traverse, the universe could be teeming with life. The discovery of thousands of exoplanets has sparked a renaissance in origin-of ...
The earliest clear evidence of life comes from biogenic carbon signatures [2] [3] and stromatolite fossils [5] discovered in 3.7 billion-year-old metasedimentary rocks from western Greenland. In 2015, possible "remains of biotic life " were found in 4.1 billion-year-old rocks in Western Australia.
