Amount of secondary xylem as compared to secondary phloem formed every year is
Amount of secondary xylem as compared to secondary phloem formed every year is
The correct option is C Depends on season and region where the plant grows
In dicotyledonous stems, during intra stelar secondary growth, a ring of cambium called vascular cambium is formed. Vascular cambium produces more amount of secondary xylem towards its innerside, and less amount of secondary phloem towards innerside. In the plants growing temperate regions, the activity of vascular cambium is influenced by existence of maximum seasonal variations. In the spring or early summer, due to the existence of favorable conditions, large amount of secondary xylem is formed. it is called Springwood or early wood. It is lighter in colour with low density. In the autumn season, due to the presence of unfavorable conditions, less amount of wood is formed. it is called autumn wood or late wood. It is darker in colour with higher density.
So, the correct answer is 'Depends on season and region where the plant grows'.
In dicotyledonous stems, during intra stelar secondary growth, a ring of cambium called vascular cambium is formed. Vascular cambium produces more amount of secondary xylem towards its innerside, and less amount of secondary phloem towards innerside. In the plants growing temperate regions, the activity of vascular cambium is influenced by existence of maximum seasonal variations. In the spring or early summer, due to the existence of favorable conditions, large amount of secondary xylem is formed. it is called Springwood or early wood. It is lighter in colour with low density. In the autumn season, due to the presence of unfavorable conditions, less amount of wood is formed. it is called autumn wood or late wood. It is darker in colour with higher density.
So, the correct answer is 'Depends on season and region where the plant grows'.
