12) Which of the following is not true regarding the evolution of multicellulari
ID: 41106 • Letter: 1
Question
12) Which of the following is not true regarding the evolution of multicellularity?
The evolution of multicellularity represents one of the major transitions in the history of life on Earth.
The transition has occurred independently many times, in many taxa, over evolutionary history.
In the early steps toward an obligate multicellularity, cells may have often joined together temporarily and then disbanded.
The transition from unicellular to multicellular life occurred only once in evolutionary history, giving rise to all multicellular organisms today.
The evolution of multicellularity represents one of the major transitions in the history of life on Earth.
The transition has occurred independently many times, in many taxa, over evolutionary history.
In the early steps toward an obligate multicellularity, cells may have often joined together temporarily and then disbanded.
The transition from unicellular to multicellular life occurred only once in evolutionary history, giving rise to all multicellular organisms today.
Explanation / Answer
“The transition from unicellular to multicellular life occurred only once in evolutionary history, giving rise to all multicellular organisms today” is not the true statement regarding the evolution of multicellularity. Therefore, the right option here is (d).
Explanation:
Multicellularity has evolved independently many a times nearly 46 times. It has occurred in some prokaryotes including myxobacteria, cyanobacteria, Actinomycetes, methanosarcina, etc. Complex multicellular organisms have evolved independently in six eukaryotic groups such as green algae, red algae, brown algae, fungi, animals, and land plants.
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