Overview Meio­sis II is ini­ti­at­ed imme­di­ate­ly after cytoki­ne­sis of Meio­sis I. It resem­bles mito­sis in its process. Results in the […] [...]

Def­i­n­i­tion: Minute, mem­brane-bound vesi­cles found in both plant and ani­mal cells. Con­tain var­i­ous enzymes nec­es­sary for cel­lu­lar process­es. Char­ac­ter­is­tics: Enclosed […] [...]

Dis­cov­ery: First described by Robert Brown in 1831. The mate­r­i­al in the nucle­us stained by basic dyes was named chro­matin […] [...]

Cen­tro­some: An organelle usu­al­ly con­tain­ing two cylin­dri­cal struc­tures called cen­tri­oles. Sur­round­ed by amor­phous peri­cen­tri­o­lar mate­r­i­al. Plays a key role in […] [...]

Def­i­n­i­tion & Struc­ture: Hair-like out­growths of the cell mem­brane. Two types: Cil­ia: Small struc­tures. Func­tion like oars to move the […] [...]

Def­i­n­i­tion: A com­plex net­work of fil­a­men­tous, pro­teina­ceous struc­tures present in the cyto­plasm. Com­posed of micro­tubules, micro­fil­a­ments, and inter­me­di­ate fil­a­ments. Com­po­nents: […] [...]

Dis­cov­ery: Observed as dense par­ti­cles under an elec­tron micro­scope by George Palade in 1953. Gran­u­lar struc­tures com­posed of ribonu­cle­ic acid […] [...]

Def­i­n­i­tion & Occur­rence: Plas­tids are present in all plant cells and eug­le­noids. Eas­i­ly observ­able under a micro­scope due to their […] [...]

Mito­chon­dria: Def­i­n­i­tion Often called the “pow­er­hous­es” of the cell. Not eas­i­ly vis­i­ble under a micro­scope unless specif­i­cal­ly stained. Num­ber Varies […] [...]