Q5. Assertion: the adaxial epidermis of a dorsiventral leaf never bears stomata. Reason: the abaxial epidermis generally bears more stomata. Are both true?
The assertion is false: NCERT says the adaxial epidermis may even lack stomata, not that it always does. The reason is true (NCERT page 76).
Q6. What are medullary rays?
A few layers of radially placed parenchyma cells between the vascular bundles of a dicot stem (NCERT page 76).
Q7. In a monocot stem, which vascular bundles are smaller: the peripheral or the central ones?
The peripheral ones (NCERT page 76).
Q8. What is the conjunctive tissue of a root?
The parenchyma lying between the xylem and the phloem (NCERT page 74).
Q9. How does the pericycle of a dicot stem appear in a section?
As semi-lunar patches of sclerenchyma above the phloem, on the inner side of the endodermis (NCERT page 76).
Q10. Why are the vascular bundles of a monocot leaf of near similar size?
Because parallel venation gives veins of near similar size, except the main veins (NCERT page 77).