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In Vulval Development in Caenorhabditis Elegans (A Soil Nematode), the Progenitor

Question 90

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In vulval development in Caenorhabditis elegans (a soil nematode) , the progenitor cell nearest to the anchor cell is exposed to the highest concentration of epidermal growth factor and activation of its EGF receptor promotes type 1 cell differentiation. The type 1 cell then prevents type 1 differentiation in adjacent progenitor cells, a mechanism called:


A) lateral inhibition.
B) hierarchical control.
C) combinatorial control.
D) downstream element inhibition.
E) loss-of-function mutation.

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