Question: 130: The anatomy of springwood shown some peculiar features. Identify the correct set of statements about springwood.
(a) It is also called as the earlywood
(b) In spring season cambium produces xylem elements with narrow vessels
(c) It is lighter in colour
(d) The springwood along with autumnwood shown alternate concentric rings forming annual rings
(e) It has lower density
Choose the correct answer from the options given below :
(1) (a), (b) and (d) Only
(2) (c), (d) and (e) Only
(3) (a), (b), (d) and (e) Only
(4) (a), (c), (d) and (e) Only
Answer: Option (4)
Explanation:
Springwood is formed during the spring season when the cambium is highly active and is also known as earlywood, so statement (a) is correct.
During spring, the cambium produces xylem elements with wide vessels and thin cell walls,
not narrow vessels, so statement (b) is incorrect.
Springwood appears lighter in colour due to larger vessel elements and thinner walls,
making statement (c) correct.
Springwood and autumnwood occur alternately as concentric rings in the stem,
together forming annual rings, so statement (d) is correct.
Due to the presence of wide vessels and thin-walled cells,
springwood has lower density compared to autumnwood, so statement (e) is correct.
Therefore, the correct set of statements is (a), (c), (d), and (e),
corresponding to Option (4).