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Did sexual reproduction evolve after the first multicellular organisms appeared?
Wiki User
∙ 11y ago
No. Sexual reproduction began when some single cells started to reproduce by meious instead of mitosis. An evolution timeline in the wikipedia article Evolution shows sexual reproduction beginning 2k mya and multicellular life beginning 1k mya.
Bill McNeill
Wiki User
∙ 11y agoYes
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How long did it take for unicellular organisms to evolve to multicellular?
Answer is not exactly known, as origin of first unicellular organisms is unknown. First multicellular organisms appeared in late Precambrian. Look up Burgess Shale for details.
When did the biosphere begin to evolve?
The biosphere is defined as the living organisms on earth. As such, it began to evolve when the first organisms appeared. Currently, this is believed to have happened about 3.5 billion years ago.
When did multicellular algae evolve?
somewhere in the Silur around 430 Million years ago.
What events occurred that allowed single celled organisms to evolve into more complex organisms at the end of the Precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
What are the advantages of unicellular to multicellular cells?
I'm assuming you mean unicellular organisms, because there is no such thing as a multicellular cell (one cell is one cell, no more, no less :P) Anyway, to answer the question I think you were trying to pose here, a unicellular organism can multiply at rates that seem almost unimaginable in comparison to how fast multicellular organisms reproduce. This ability offers several evolutionary advantages: Because of the extremely rapid rate of replication, unicellular organisms can evolve and adapt to their surroundings much faster. For example, if someone were taking antibiotics, and stopped taking them because the infection they were using them for seemed to be gone, there would most likely still be at least a few of the infectious microbes left in their body, and they could quickly become immune to the antibiotics by starting to multiply again. Multicellular organisms do not have this advantage, and evolve much slower, though it is also often much harder to kill them. Most cannot multiply fast enough to generate a gene that would make them immune to a poison when their population is dwindling (and if the animal multiplies sexually, it would have yet another disadvantage, as it only takes one unicellular organism to repopulate an ecosystem, since they can do it on their own).
How long did it take for unicellular organisms to evolve to multicellular?
Answer is not exactly known, as origin of first unicellular organisms is unknown. First multicellular organisms appeared in late Precambrian. Look up Burgess Shale for details.
Did unicellular or multicellular organisms evolve first?
Unicellular organisms evolved first; and from them evolved the multicellular organisms. But that leads onto another question as to why multicellular organisms evolved.
What did the kingdom animals evolve from?
Animals in the kingdom Animalia evolved from simple multicellular organisms around 600 million years ago. Their evolutionary path can be traced back to a common ancestor shared with other multicellular organisms like sponges and jellyfish.
When did the biosphere begin to evolve?
The biosphere is defined as the living organisms on earth. As such, it began to evolve when the first organisms appeared. Currently, this is believed to have happened about 3.5 billion years ago.
When did the hypohippus appear and into what organisms did it likely evolve?
it appeared a long time ago its extinct and it evolved into a horse
What role did cyanbacteria play in the evolution of life on earth?
The role of raising atmospheric oxygen to so high a level that multicellular and complex organisms could evolve. Oxidative phosphorylation generates the energy through ATP that larger and more complex organisms need.
Where did life on earth evolve from?
Probably photosynthetic multicellular protists, such as Rhodophyta and Chlorophyta.
Do organisms decide to evolve?
No
How many organism's might evolve?
all of the organisms can evolve.
Why is it necessary for organisms to evolve?
If they do not evolve, they may eventually die out.
When did multicellular algae evolve?
somewhere in the Silur around 430 Million years ago.
What group of protists did the first plants evolve from?
Scientists thing protists evolved from archaea, which are simply single celled organisms.
