In a six year old stem, the oldest layer of secondary xylem is situate

1.	In a six year old stem, the oldest layer of secondary xylem is situated just : (1) Outside the primary xylem (2) Outside vascular cambium (3) On the inner side of cork cambium (4) On the inner side of vascular cambium
Answer» Correct option (1) Outside the primary xylem Explanation: During secondary growth, secondary xylem is formed, outside to the primary xylem. So the newest layers will be towards vascular cambium, while the oldest will be towards primary xylem.

In a six year old stem, the oldest layer of secondary xylem is situated just : (1) Outside the primary xylem (2) Outside vascular cambium (3) On the inner side of cork cambium (4) On the inner side of vascular cambium

Answer»

Correct option (1) Outside the primary xylem

Explanation:

During secondary growth, secondary xylem is formed, outside to the primary xylem. So the newest layers will be towards vascular cambium, while the oldest will be towards primary xylem.

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In a six year old stem, the oldest layer of secondary xylem is situated just : (1) Outside the primary xylem (2) Outside vascular cambium (3) On the inner side of cork cambium (4) On the inner side of vascular cambium

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