What is the evolutionary improvement from protostoma to deuterostoma??
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in deuterostoma the cleavage of zygote in these is radial and indeterminate unlike spiral and determinate that in protostomes . in such cleavage pattern the fate of resultant blastomeres is established not in early cleavage but in later , blastula or grastula stages.
Vigneshwar2000:
What i exactly asked is.......
New generations are smarter than the old....... Evolution...... I that case... What is need to form primarily anus..??????? In which characteristic deuterostomes are smarter than protostomes?????
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