MCQ
_______ are responsible for chemical coordination.
- ANeurons
- BNephrons
- ✓Hormones
- DEnzymes

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$I.$ Biological names are generally in Franch
$II.$ First word in biological name represents the genus
$III.$ Second word in biological name is written in capital letter
$IV.$ When the scientific name is hand written underline should be done.

Statement $I$: In $\mathrm{C}_3$ plants, some $\mathrm{O}_2$ binds to $\mathrm{RuBisCO}$, hence $\mathrm{CO}_2$ fixation is decreased.
Statement $II$: In $\mathrm{C}_4$ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration.
In the light of the above statements, choose the correct answer from the options given below: