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.
(a) Aseptate and multinucleate (b) Septate and multinucleate (c) Aseptate and uninucleate (d) Septate and uninucleate Answer. (b) The mycelium of Aspergillus consist of branch septate hyphae. Cells of hyphae are multinucleate. (185)
(a) Parenchyma (b) Chlorenchyma (c) Plectenchyma (d) Collenchyma Answer. (c) Plectenchyma (Pseudoparenchyma) is nothing but the interwoven mass of fungal mycelium which in cross-section look like parenchyma. (108)
(a) Colletotrichum falcatum (b) Phytophthora infestans (c) Potato mosiac virus (d) Alternaria solani Answer. (b) Late blight of potato is a seed born disease which is caused by Phytophthora infestans. The disease is characterised by brownish to blackish dead areas …
