The transition from unicellularity to multicellularity
A) has occurred once.
B) is an obligate condition.
C) occurs only in slime molds.
D) must convey a selective advantage to individuals if it is to occur.

Question

Quizplus · Accepted Answer

The transition from unicellularity to multicellularity must convey a selective advantage to individuals if it is to occur. This is because the development of multicellularity is an energetically costly process that requires cooperation and communication among cells. Therefore, the benefits of multicellularity must outweigh the costs of individual cells giving up some level of autonomy in order to form a larger, more complex organism.

The Transition from Unicellularity to Multicellularity