a) in c.elegans development, when Abala cell is killed by laser ablation, the Abarp cell regulates so that anterior pharynx tissues are still able to form and total number of cells from AB lineage is same as in normal development
b) the mutation or knockout of Abdominal A gene in drosophila so that all cells in that segment adopts the T4 fate is an example of regulative development
c) normal development continues in the remaining 7 cells after removal of a single cell from an 8 cell mouse embryo
d) when the AB cell from a 2 cell c.elegans embryo is removed, the P1 cell regulates to form the posterior pharynx
e) none of the above is an example of regulative development
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