For an easy understnading I will choose the correct option and will also give the explanation regarding the same.
before that let us understand the difference between conditional and autononomous specifictaion:
| autononomous | conditional |
| independent of the interaction with the surrounding and dependent upon certain seggregation factors such as mRNA and protien | interaction of a cell with surrounding cell and environment can restrict the fate of the cell |
| It is a characterstics of most invertebrates. | It can be shown in vertebrates and few invertebrates. |
1.C.elegans embryo encounters both conditional as well as autononomous specification.
Where and When it is used:
| conditional | autononomous |
| Can be seen in the development of the endoderm cell lineage | Determination of the P1 lineages appears to be autonomous |
2.Therefore as I have already mentioned above that Mostly invertebrates shows autonomous specification and hence Snalis belongs to gastropoda which are Mollusc(invertebrate).
3.In Plant(Aribdopsis) Restriction of cell fate occurs.
Hope you not only got the answer but also gathered some useful information regarding the topic. Please do not hesitate to enquire your further doubts.
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