Sentences with phrase «multicellular animal»

Before the cambrian explosion (nonterrestrian life) multicellular animal fossils are known only from Vendian which is after «snowball earth» times.

[11] This episode marked the close of the Precambrian eon, and was succeeded by the generally warmer conditions of the Phanerozoic, during which multicellular animal and plant life evolved.

All the analyses indicate that land plants first appeared about 500 million years ago, during the Cambrian period, when the development of multicellular animal species took off.

Here he developed a keen interest in the early evolutionary history of multicellular animal life.

It was but a single cell, and man is at the least a multicellular animal with an elaborate nervous system.

The study reveals that a complex and expansive ecology existed in the period known as the Cambrian Explosion, the time when advanced multicellular animals suddenly appeared on Earth.

The natural process of biological evolution can not explain the concurrent appearance of a highly advanced ecology in conjunction with the explosive introduction of the first true multicellular animals.

The first dramatic claim came in the 2 October issue of Science (pp. 19 and 80), when researchers said they had found tracks of multicellular animals in 1.1 - billion - year - old Indian rocks.

The two possible solutions have very different consequences for our understanding of central aspects of the early evolution of multicellular animals (Metazoa), such as the origins of nervous systems, tissues and organs.

In particular, they are also interested in clarifying the position of the simplest of all multicellular animals, the Placozoa.

By the time he got to Brussels for the second round, he was able to demonstrate their existence — but the genes were only present in multicellular animals.

Last April Italian and Danish deep - sea researchers described multicellular animals that conduct their entire lives without respiring oxygen.

Sponges were the first multicellular animals to evolve, so the finding means all complex life has a skin.

The gastrointestinal tract or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and expels the remaining waste.

The ability of some animals to regenerate tissue is generally considered to be an ancient quality of all multicellular animals.

Some time between 700 and 600 million years ago, early multicellular animals appear to have burrowed and grazed the mats to destruction — showing that humans are by no means the first to overexploit their environment.

The area has become a mecca for scientists, in part due to the presence of stromatolites — reeflike structures created by blue - green algae that were abundant before the rise of multicellular animals.

It took hundreds of millions of years on Earth for life to evolve from single - celled animals up to multicellular animals to intelligent beings.

Like all multicellular animals, insects fuel their metabolism by taking in oxygen.

Almost all multicellular animals have an arsenal of cells or molecules that broadly target potentially dangerous microbes.

The activities of cells in multicellular animals are co-ordinated by chemical messengers and nerve cells.

The researchers discovered that from one stage to another, Capsaspora's suite of proteins undergoes extensive changes, and the organism uses many of the same tools as multicellular animals to regulate these cellular processes.

Modern multicellular animals probably evolved from an ancestor very similar to a choanoflagellate, and animal sperm use enzymes similar to EroS to identify and penetrate eggs of the right species.

The tangled symbiotic and pathogenic relationships between bacteria and multicellular animals go back into deep evolutionary time where fossils of ancestral microscopic soft - bodied eukaryotes are unlikely to have survived.

According to this view, early sponges sit at the base of the animal tree of life, which then forks into four other groups: comb jellies, jellyfish, primitive multicellular animals called placazoa, and another group of early symmetrical animals that led to worms, insects, and ultimately us (bilaterians).

With their choanoflagellate - like choanocyte cells and a second type of cell, an archaeocyte, that can shift shape and function as needed to absorb food, secrete new skin, or reproduce, they became the first multicellular animals.

(By comparison, all multicellular animals in the world comprise only a few dozen phyla.)

To put this in perspective, all the multicellular animals in the world comprise only a few dozen phyla.

January 7, 2016 Scientists find ancient mutation that contributed to the evolution of multicellular animals A single chance mutation about a billion years ago caused an ancient protein to evolve a new function essential for multicellularity in animals, according to new research co-led by a University of Chicago scientist.

In multicellular animals, the gene domains found new purposes, such as allowing cells to signal one another.

In multicellular animals, nutritional information is mostly perceived by peripheral organs.

The emergence of multicellular animals from single - celled ancestors over 600 million years ago required the evolution of mechanisms for coordinating cell division, growth, specialization, adhesion and death.

Not exact matches

«In its 4.6 billion years circling the sun, the Earth has harbored an increasing diversity of life forms: for the last 3.6 billion years, simple cells (prokaryotes); for the last 3.4 billion years, cyanobacteria performing ph - otosynthesis; for the last 2 billion years, complex cells (eukaryotes); for the last 1 billion years, multicellular life; for the last 600 million years, simple animals; for the last 550 million years, bilaterians, animals with a front and a back; for the last 500 million years, fish and proto - amphibians; for the last 475 million years, land plants; for the last 400 million years, insects and seeds; for the last 360 million years, amphibians; for the last 300 million years, reptiles; for the last 200 million years, mammals; for the last 150 million years, birds; for the last 130 million years, flowers; for the last 60 million years, the primates, for the last 20 million years, the family H - ominidae (great apes); for the last 2.5 million years, the genus H - omo (human predecessors); for the last 200,000 years, anatomically modern humans.»

for the last 3.6 billion years, simple cells (prokaryotes); for the last 3.4 billion years, cyanobacteria performing photosynthesis; for the last 2 billion years, complex cells (eukaryotes); for the last 1 billion years, multicellular life; for the last 600 million years, simple animals; for the last 550 million years, bilaterians, animals with a front and a back; for the last 500 million years, fish and proto - amphibians; for the last 475 million years, land plants; for the last 400 million years, insects and seeds; for the last 360 million years, amphibians; for the last 300 million years, reptiles; for the last 200 million years, ma - mmals; for the last 150 million years, birds; for the last 130 million years, flowers; for the last 60 million years, the primates, for the last 20 million years, the family H - ominidae (great apes); for the last 2.5 million years, the genus H - omo (human predecessors); for the last 200,000 years, anatomically modern humans.

Then come complex multicellular organisms, societies of animals with new emergent properties at the ecosystem level, and, finally conscious beings who create culture, use symbolic language — and experience the first intimations of transcendence.

At least at the level of multicellular creatures — fungi, animals, plants, algae — scientists are pretty sure that DNA - based life forms did beat out their competition (just look around).

But animals are usually defined as macroscopic multicellular organisms, and this is not that.

The first multicellular marine animals appeared at around this time — and Hayes's team believes they are the key.

«But they are the first of the truly large, multicellular organisms that radiated broadly before the first true animals evolved.»

Self - assembly enables nature to build complex forms, from multicellular organisms to complex animal structures such as flocks of birds, through the interaction of vast numbers of limited and unreliable individuals.

Although the oldest animal fossils date back 544 million years, most evolutionists agree that complex, multicellular creatures probably appeared at least 150 million years earlier than that.

Ruiz - Trillo and his team sequenced the Capsaspora genome in an earlier project and discovered that the amoeba contained many genes that, in animals, are related to multicellular functions.

The evolution of a distinct germ line that is protected by the diverse somatic functions of the organism is thought to confer an evolutionary advantage — what we call a fitness benefit — to multicellular organisms, whether plant or animal or slime mold.

A multicellular marine animal without organs, Trichoplax's feeding behavior may include cellular coordination, resulting in external food digestion, according to a study published September 2, 2015 in the open - access journal PLOS ONE by Carolyn Smith and colleagues from the National Institute of Health in Bethesda, MD..

«In a number of cases such multicellular aggregates are able to the progressive development that may end up with a full reconstructionof an animal's initialorganization.

In the new vision — based on increasingly sophisticated genetic analyses — people and other animals are closer cousins to single - celled choanoflagellates than to other multicellular organisms.

There may be some truth to both men's viewpoints: The first animals may well have looked more like a sac of mesomycetozoeans than like any modern multicellular creature.

Whittaker crowned his tree of life with three kingdoms of primarily multicellular eukaryotes sorted in large part by nutritional style: plants (capturing light energy), fungi (absorbing nutrients by contact) and animals (ingesting their food).

All major groups of animals — an entire kingdom of multicellular life that today includes insects, worms, shellfish, starfish, sea anemones, coral, jellyfish, and vertebrates like us — bloomed suddenly in the fossil record during an evolutionary extravaganza known as the Cambrian explosion, which occurred 530 million years ago.

The rise of multicellular structures in animals may have hinged on a chemical link between sulfur and nitrogen atoms.