It is referred to as the mitotic spindle during mitosis , a process that produces genetically identical daughter cells, or the meiotic spindle during meiosis , a process that produces gametes with half the number of chromosomes of the parent cell. Besides chromosomes, the spindle apparatus is composed of hundreds of proteins .
Excuse. In jurisprudence, an excuse or justification is a defense to criminal charges that is distinct from an exculpation. Exculpation is related concept which reduces or extinguishes a person's culpability and therefore a person's liability to pay compensation to the victim of a tort in the civil law.
noun. 1  An explanation offered to justify or obtain forgiveness. 2  A reason or grounds for excusing: Ignorance is no excuse for breaking the law. 3  The act of excusing. 4  A note explaining an absence. 5  Informal An inferior example: a poor excuse for a poet; a sorry excuse for a car.