Q5. From which meristem do leaves originate, and in what order are they arranged?
From shoot apical meristems; they are arranged in an acropetal order (NCERT page 59).
Q6. Which type of venation do most monocotyledons have?
Parallel venation (NCERT page 60).
Q7. Name a plant with a pinnately compound leaf and one with a palmately compound leaf, as given by NCERT.
Neem (pinnately compound) and silk cotton (palmately compound) (NCERT pages 60–61).
Q8. What is opposite decussate phyllotaxy, and is guava reliably described as opposite superposed?
Decussate means each opposite pair is at right angles to the next. IISc’s Digital Flora describes guava as opposite and decussate, so do not use guava as a universal superposed example; NCERT page 61 simply lists guava and Calotropis as opposite.
Q9. What is the midrib?
The usually prominent middle vein of the lamina (NCERT page 60).
Q10. Assertion: a leaflet of a compound leaf has no axillary bud. Reason: a leaflet is a part of the lamina of one leaf, and a bud is borne only in the axil of a whole leaf. Are both true, and does the reason explain the assertion?
Both are true, and the reason explains the assertion (NCERT page 60).
Q11. Which five features of the lamina vary between leaves?
Its shape, margin, apex, surface and extent of incision (NCERT page 60). The chapter Summary (page 69) lists size in place of surface.
Q12. Do leaves develop exogenously or endogenously?
Exogenously, at the node (NCERT Summary, page 69).