Results tagged “evolution”

In evolutionary biology, tracing back ancestral genetic elements is a quest in reconstructing the history of life on earth. The presence of similar or "homologous" genes in different species speaks of shared ancestry and of past molecular events that led to diversification from a common ancestor, ultimately leading to speciation.

Micro-organisms persisting deep below the seafloor for millions of years continue to evolve despite living at the energy limit to life.

According to a UC Riverside study, 555-million-year-old oceanic creatures from the Ediacaran period share genes with today's animals, including humans.

Charles Darwin's landmark opus, On the Origin of the Species, ends with a beautiful summary of his theory of evolution,

Protocell compartments used as models for an important step in the early evolution of life on Earth can be made from short polymers.

Two teams of scientists have resolved a longstanding controversy surrounding the origins of complex life on Earth.

Biologists have long hoped to understand the nature of the earliest living organisms on Earth. If they could, they might then be able to say something about how, when, and where life arose on Earth, and perhaps by extension, whether life is common in the Universe.

Evolution During The Cambrian Explosion

A new study by an international team of scientists has revealed the developmental and evolutionary mechanisms underlying the origin of a major phylum.

The origin of eukaryotes remains enigmatic. Current data suggests that eukaryotes may have risen from an archaeal lineage known as "Asgard archaea".

The air, earth and water of our planet are pulsating with living things. Yet, a vast and diverse web of life exists, about which almost nothing is known. This is the world of flagellates, tiny organisms that persist in staggering numbers in many diverse ecosystems around the world.

The discovery of giant viruses with large genomes has transformed our understanding of the limits of viral complexity in the biosphere, and subsequent research in model virus-host systems has advanced our knowledge of intricate mechanisms used by these viruses to take over host cells during infection.

Life In Evolution's Fast Lane

Most living things have a suite of genes dedicated to repairing their DNA, limiting the rate at which their genomes change through time.

Extreme fluctuations in atmospheric oxygen levels corresponded with evolutionary surges and extinctions in animal biodiversity during the Cambrian explosion, finds new study led by UCL and the University of Leeds.

arth's first complex animals were an eclectic bunch that lived in the shallow oceans between 580-540 million years ago.

Multicellularity--the integration of previously autonomous cells into a new, more complex organism--is one of the major transitions in evolution.

Newly discovered fossil evidence from Namibia strengthens the proposition that the world's first mass extinction was caused by "ecosystem engineers" - newly evolved biological organisms that altered the environment so radically it drove older species to extinction.

Early life forms on Earth are likely to have mutated and evolved at much higher rates than they do today, suggests a new analysis from researchers at the University of North Carolina.

Life on Earth often depends on symbiotic relationships between microbes and other forms of life.

Parts of the primordial soup in which life arose have been maintained in our cells today according to scientists at the University of East Anglia.

Organisms have increased in complexity through a series of major evolutionary transitions, in which formerly autonomous entities become parts of a novel higher-level entity.

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