A researcher exposes a sea urchin blastula to a protein that inhibits filopodia formation.Which event will most immediately be compromised in the manipulated blastula?
A) Flattening of the vegetal hemisphere
B) Shape changes in cells of the vegetal pole
C) Formation of primary mesenchyme
D) Elongation of the archenteron
E) Invagination of the animal pole
Correct Answer:
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