An angiosperm, Endomitosis occur in:(a) Ovule (b) Tapetum (c) Endothecium (d) Leaftip Share with your friends Share 0 Mrigankasaikia answered this tapetum 3 View Full Answer Vivek Rai answered this tapetum helps it in providing nutrients and regulatory molecules to the forming pollen grains. The following processes are responsible for this: Endomitosis Normal mitosis not followed by cytokinesis Formation of restitution nuclei Endoreduplication 0