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
26. In which group the entire surface is covered by bark?
A. woody stem and mature roots
B. young tiny stem and young roots
C. woody stems and leaves
D. immature roots and leaves
Answer:
A. woody stem and mature roots
27. The pores in the layers of the bark is called:
A. lenticles
B. stomata
C. goosebumps
D. small cavities
Answer:
A. lenticles
28. What is function of lenticels?
A. allow air to pass through them
B. give support to the plant
C. provide food to the plant
D. provide energy to the plant
Answer:
A. allow air to pass through them
29. Opening and closing of stomata controls:
A. gaseous exchange
B. movement of plants
C. growth of plants
D. protection against environment
Answer:
A. gaseous exchange
30. In human and other higher animals the exchange of gases is carried out by the:
A. digestive system
B. respiratory system
C. excreting system
D. circulatory system
Answer:
B. Respiratory System
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