Question

1. Cells spend the longest amount of time in what stage of the cell cycle? What evidence did you observe in the slides to justify your answer? 2. What is the purpose of mitosis? 3. For each of the stages of mitosis, provide a brief description of what you observed (not the book descriptions). How can you tell one stage from another? 4. What physical characteristics did you observe that differentiates plant cell mitosis from animal mitosis?

Answer 1

Answer:-

- Answer - 1 cell (espends longest amount of time in Interphase (gor. time I SEM evidence : les ) dense structure Cnudeolus) in nucleus ii) Chromatin lare leost condensed ť distributed through aut the nucleus. Fill cellular orgnallder are double in number. i) chromosomes are not visible. Ans - 2 ods. our purpose of Mitosis. . To maintain the proper number of Chromosomes from generation to goneration Is ii) To produce identical organisms or Aliclones cord l. 111) To replace worn aut cells or repair damaged fissue. iv) To increase the size of an orqarism Ans: 3) stages of Mitosis : are 1) Interphase : - - Nucleolus & the nuclear envelope distinct int - Chromosomes are in the form threadlike chromatin. of

DATE 1) - Prophase : - Chromosomes appear condensed The nuclear envelope is not apprenant TI) Metaphase'- - Thick coiled chromosome - - each chromosome with two Chromatids nordli & they are lined up on the metaphase plate. ollinson organomord (or IV ) Anaphase :- - Chromatids have separated * Moving towards the poler addesss sgoig dt Orlorn of I). Telophase' r espin - The Chromosomer I are at the poler. ť becomes more diffuse. - Nadear envelope is reforming w) - The exto plasm may be devider se obro Cestokinesis Dirision into two cells is compted. Answer - 4 Physical characteristics that differentiater plant Cell mitosis from Arenal cell mitosis

PAGE NO DATE Plant Animal cell pitoris Cell mitoris i i Animal cell become Raunded before cell division plast cell do not change shape before cell division. in ii) Specific hadmane that induces mitoris, Cannat be iden Cytokinin is o hormone that jonduces mitosis are in I iv) Cestou some formed no te Centrosomes are not formed Asters present iv) Asters absent ₂) Spindle is amphistoa) Spindle is anastral V) Centrioles present [vil Centroles absent vii) spindle generate - I before the beginning of cytokinesis vii] Spindle exist as the phragmoplast during lafokinesis. vill) Midbody appears viii] do not appear (malboog (x) occurs body through Ex) the occur in Mexistem