MCQ
Where would you look for active cell division in plants?
- AIn the pith cells
- BIn the cells of cortex
- CIn the internodal region
- DAt the tip of root and shoot
Explanation:
Meristem is the region of the plant where active cell division can be seen.
It is the part where cells are continuously dividing into different types of cells
In plants the growth is represented by the growth at the tips and the roots as there will be more number of meristems at the tips of roots and stems.
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$I.$ Chromosomal material condenses to form compact mitotic chromosomes
$II.$ The assembly of mitotic spindle is initiated by the microtubules
$III.$ Cells do not show organelles when viewed under the prophase
$IV.$ The nucleolus or nucleoli degenerate completely
$I.$ In the centre of each I-band is an elastic fibre ($Z-$line) which bisects it
$II.$ Thin filament are firmly attached to the $Z-$line
$III.\;M-$line is a fibrous membrane in the middle of $A-$band
$IV.$ A sarcomere comprises one full$-A $ band and two half $I-$bands