Sentences with phrase «complex multicellular life»

The fossil record suggests complex multicellular life emerged about 600 million years ago in a relatively short period termed the «Cambrian explosion,» during which most major animal phyla appeared.

What triggered the explosion of complex multicellular life in the Cambrian period?

Historically, photosynthetic bacteria pumped oxygen into the oceans for billions of years, setting the stage for complex multicellular life.

These specialized reproductive cells — familiar to us as sperm and eggs in humans — set the stage for complex multicellular life because they free up all the other cells in the body (known as somatic cells) to specialize for many other functions.

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.

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

Although life seems to have only taken 500 million years to arise on Earth, the move from simple bacteria to complex multicellular creatures took another 2.5 billion years, and technological intelligence has appeared on this planet only once.

PULLMAN, Wash. — If the origin of life is common on other worlds, the universe should be a cosmic zoo full of complex multicellular organisms.

The Phanerozoic Eon (542 million years ago to the present), which includes the entire span of complex, multicellular life on Earth, has witnessed an extraordinary array of climatic states and transitions.