18. Meaningful girdling (Ringing) experiments cannot be done on sugarcane because
(a) Phloem is present inside the xylem
(b) It can not tolerate the injury
(c) Vascular bundles are scattered
(d) Plants are very delicate
Ans. (c) In monocot like sugarcane, maize, etc. due to absence of cambium secondary growth is not found. So removal of bark (phloem) is not possible so that ringing experiment is not possible.
(21)