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Biology · CELL CYCLE AND CELL DIVISION

हिन्दी

How does plant cytokinesis fundamentally differ from animal cytokinesis in terms of precursor structure and direction of wall/furrow formation?

  1. Plant: Cleavage furrow grows inward centripetally; Animal: Cell-plate grows centrifugally
  2. Plant: Cell-plate forms at centre and grows outward centrifugally; Animal: Furrow appears in plasma membrane and deepens centripetally
  3. Plant: Middle lamella breaks down outward; Animal: Aster microfilaments polymerize outward
  4. Plant: Contractile ring constricts from outside inward; Animal: Phragmoplast deposits callose from inside outward

Correct answer · Option 2

Plant: Cell-plate forms at centre and grows outward centrifugally; Animal: Furrow appears in plasma membrane and deepens centripetally

Explanation

Plant cytokinesis begins with a cell-plate in the centre that grows outward to meet lateral walls, whereas in animal cells a furrow develops in the plasma membrane and deepens centripetally to join in the centre.

Related questions

A diploid parent cell has 20 bivalents during prophase I of meiosis. What will be the number of chromosomes in each of the four daughter cells formed at the end of meiosis II?→During anaphase of mitosis, as daughter chromosomes migrate toward opposite poles, the orientation of their structural regions is such that:→In oocytes of certain vertebrates, which sub-stage of Prophase I can last for months or even years?→Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): During the S phase of the cell cycle, the amount of DNA per cell doubles from 2C to 4C, but the chromosome number remains unchanged (2n). Reason (R): DNA replication creates duplicate copies of the DNA molecules, which remain attached as sister chromatids at a single centromere. In the light of the above statements, choose the correct answer from the options given below:→
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