10th Class Chapter No.1
Biology MCQs Online Quiz
All MCQs Selected from Old Board Papers
Best MCQs for Board Examination
Total MCQs ( in this Quiz ) = 50
21. Plants have:
A. No organs or system for the exchange of gases
B. Specialized system for the exchange of gases.
C. Complex system for the exchange of gases
D. Advanced system for the exchange of gases
Answer:
A. No organs or system for the exchange of gases
22. Which organs leaves and young stems have for the gasses exchange?
A. Stomata
B. Mesophyll
C. Cotyledons
D. Embryo
Answer:
A. Stomata
23. Some gaseous exchange in young stem and leaves occurs through.
A. Cuticle
B. Mid-rib
C. Petiole
D. Thalamus
Answer:
A. Cuticle
24. What is another name for the windpipe?
A. lungs
B. larynx
C. oesophagus
D. trachea
Answer:
B. larynx
25. Which cells of leaves carrying out photosynthesis and respiration in day-time?
A. Mesophyll cells
B. Cortex
C. pericycle
D. Epidermis
Answer:
A. Mesophyll cells
