MCQ
What is correct regarding leucocytes?
- AThese can squeeze out through (can cross) the capillary walls.
- BThese are enucleated.
- CSudden fall in their number indicates cancer.
- DThese are produced in thymus.
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$I.$ Secondary cortex
$II.$ Autumn wood
$III.$ Secondary phloem
$IV.$ Phellem