MCQ
Heartwood differs from sapwood in:
- APresence of rays and fibres.
- BAbsence of vessels and parenchyma.
- ✓Having dead and non$-$conducting elements.
- DBeing susceptible to pests and pathogens.
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$\left.2 \mid C _{51} H _{98} O _{6}\right)+145 O _{2} \rightarrow 102 CO _{2}+98 H _{2} O +i$ Energy
The respiratory quotient in this case is
- It is site for active ribosomal $RNA$ synthesis
- It is spherical structure