MCQ
How many meiotic divisions are necessary to produce $100$ pollen grains
- A$100$
- ✓$25$
- C$50$
- D$20$
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Column $-I$ |
Column $-II$ |
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$A.$ Light reaction |
$1.$ Membranous system |
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$B.$ Dark reaction |
$2.$ $NADPH$ and $ATP$ product |
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$3.$ Starch |
$A - B$
$1.$ Chromosomes cluster at opposite spindle poles
$2.$ Spindle fibres attach to kinetochores of chromosomes
$3.$ Nuclear envelope assembles around the chromosomes clusters.