How might multicellular organisms have arisen?

Question

Quizplus · Accepted Answer

Multicellular organisms likely arose from single-celled organisms joining together, or failing to separate after cell division. Over time, these clusters of cells evolved to specialize and cooperate, eventually forming the complex systems of modern multicellular organisms. Option B is incorrect because it only specifies organisms joining together, without accounting for the possibility of failed separation. Option C is incorrect because it only accounts for failed separation without including the potential for joining. Option D is possible, but not as likely as option A, as endocytosis plays a less significant role in the evolution of multicellularity. Option E is also possible, but less likely than option A, as it suggests two distinct species forming a single organism, rather than a single species evolving to form a multicellular organism.

How Might Multicellular Organisms Have Arisen