Which of the following statements is incorrect? (1) The spermatids differentiate into structural...
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Which of the following statements is incorrect?
(1) The spermatids differentiate into structurally complex spermatozoa by the process of spermiogenesis
(2) Fertilisation is a physico-chemical event
(3) Cleavage transforms the fertilized ovum into a sphere of aggregated blastomeres
(4) Cleavage divisions bring appreciable increase in the mass of protoplasm in the developing embryo
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