2. In order for the development of life on Earth. a very important transition had to occur. Which of the following would have been an important early step in the evolutionary history of organisms on Earth? A. Unicellular organisms had to evolve into multicellular organisms. B. Unicellular organisms had to become extinct. C. Multicellular organisms had to evolve into less complex unicellular organisms. D. Multicellular organisms had to become extinct.

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2. In order for the development of life on Earth. a very important transition had to occur. Which of the following would have been an important early step in the evolutionary history of organisms on Earth? A. Unicellular organisms had to evolve into multicellular organisms. B. Unicellular organisms had to become extinct. C. Multicellular organisms had to evolve into less complex unicellular organisms. D. Multicellular organisms had to become extinct.

Answer 1

The correct answer is A. Unicellular organisms had to evolve into multicellular organisms.<br /><br />The development of life on Earth required a significant transition from unicellular organisms to multicellular organisms. This transition allowed for the formation of more complex structures and the specialization of different cell types, which ultimately led to the evolution of diverse and advanced organisms.

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