Two mechanisms that must evolve in order to make multicellularity possible are:
• Specialization of the cells which reffers specialization in function(not all cells do exactly the same thing, otherwise they would just be a group of cells or a colony)
• Adhesion, communication and cooperation-requires that the cells coordinate their activities by sending signals to each other. They shoul work cooperatively to develop their multicellular "body".
Answer:
The correct answer will be-
1. Autonomous cell specification
2. Cell determination
Explanation:
The multi-cellular organisms have evolved from the unicellular organisms by evolving the two related mechanisms involved in the formation of multi-cellular mechanisms which are- cell determination and specification.
Cell determination is the ability of the cell to determine its fate depending on the chemical detected by the cell in a different region of the embryo. The chemical activates a series of events in cell-like activates a set of genes and intra and intercellular communication.
The Autonomous cell specification is the ability of a cell in which the cell is able to differentiate to carry out a specialized function without receiving any external signals.
Thus, Autonomous cell specification and Cell determination is the correct answer.
