(D) Schmidt $(1924)$ proposed the tunica-corpus theory,which describes the presence of two distinct zones in the shoot apices of angiosperms.The perip

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(D) Schmidt $(1924)$ proposed the tunica-corpus theory,which describes the presence of two distinct zones in the shoot apices of angiosperms.The peripheral layer$(s)$ of cells is called the tunica,while the inner mass of cells is called the corpus,which is surrounded by the tunica.