Sentences with phrase «for multicellular animals»
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.»
http://religion.blogs.cnn.com/
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.
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.
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.
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.
Canadian Institute for Advanced Research senior fellows Brian Leander and Patrick Keeling supervised lead author Greg Gavelis at the University of British Columbia and, in collaboration with senior fellow Curtis Suttle, showed that this eye - like structure contains a collection of sub-cellular organelles that look very much like the lens, cornea, iris and retina of multicellular eyes that can detect objects — known as camera eyes — that are found in humans and other larger animals.
Star A's late spectral type and dim luminosity puts it possibly close to the lower limit of habitability for (multicellular) Earth - type plant and animal life, given the redness of its light and the increased risk of tidal locking from the closeness of the orbit necessary for liquid water on a planetary surface.
Mild oxygen levels in shallow seas but oxygen - poor deep oceans lasted for some 1.3 billion years during a time that has been dubbed the «Boring Billion» but eventually led to the development of mitochondria that now power multicellular planet and animal life (Nick Lane, New Scientist, February 10, 2010; Rachel Ehrenberg, Science News, September 29, 2009; Johnston et al, 2009; and H.D. Holland, 2006).
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.
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.