Question 35 of 40
Q.Consider the following statements. In spring season vascular cambium:
(i) is less active.
(ii) produces a large number of xylary elements.
(iii) forms xylem vessels with wide cavities of these.
(a)
(i) and
(ii) are correct but
(iii) is not correct.
(b)
(i) is correct but
(ii) and
(iii) are not correct.
(c)
(i) and
(ii) are not correct but
(iii) is correct.
(d)
(i) is not correct but
(ii) and
(iii) are correct.
Puducherry TnboardTamil Nadu HSC First Year (DGE) Board 2025MCQ· 1mImportance★★★★★
88% · 35/40 Questions
You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.
Start your 14-day free trial to unlock the full solution →Spring wood forms because the cambium is highly active in spring, laying down many wide-cavitied xylem vessels — so (i) is false while (ii) and (iii) are true.
The activity of the vascular cambium varies with the season, and this seasonal variation is exactly what produces the annual growth rings seen in a woody stem's cross-section.
Check each statement:
- "is less active" — this is FALSE. In spring, water and nutrients are abundant and conditions favour active cell division, so the cambium is at its MOST active, not least active.
- "produces a large number of xylary elements" — this is TRUE. Because the cambium is dividing rapidly, it cuts off many new xylem (and phloem) mother cells in a short time. …
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.