MCQ
Excretion means
- ✓Removal of useless substances and substances present in excess
- BFormation of those substances which have some role in the body
- CRemoval of such substances which have never been part of the body
- DAll of these
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$P$ |
$Q$ |
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$1.$ Nutrients (Macro and Micro) |
$a.$ Medium for enzymatic activities |
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$2.$ Oxygen |
$b.$ Synthesis of protoplasm and act as a source of energy |
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$3.$ Water |
$c.$ Releasing metabolic energy for growth activities |
$I.$ It does not help in water conduction.
$II.$ It is also called alburnum.
$III.$ It is dark in colour but very soft.
$IV.$ It has tracheary elements, which are filled with tannin, resin, etc.