Growth rings are formed due to the activity of -

Growth rings are formed due to activity of

Growth rings are.formed due to activity of

Growth rings are formed by the activity of

Growth rings are formed by the activity of (a) Extrasteral cambium (b) Intrasteler cambium (c) Interstelar cambium (d) Both b and c

Annual growth rings are formed due to activity

Annual growth rings are formed due to activity

Annual growth rings are formed due to activity

Annual rings and growth rings are formed due to the fluctuations in the activity of

growth/annual rings are formed by the activity of