Newspaper Delivery & Online. Phone: 1-800-482-1121. Email: customerservice@nwaonline.com. Please note that the email address above is for Customer Service.
Full Definition of CLEAVAGE. 1. a: the quality of a crystallized substance or rock of splitting along definite planes; also: the occurrence of such splitting b: a fragment (as of a diamond) obtained by splitting. 2. : the action of cleaving: the state of being cleft. 3.
In animal cell, a cleavage is formed first of all in the middle of the cell that has to be divided, the cleavage deepens until it meets the membrane and then eventually cell divides. While in plant cells, a row of vesicles develop during cytokinesis.