31. Why jams and pickles are immersed in concentrated sugar solution or oil
(a) They do not rot due to their own growth
(b) They do not rot due to fungal or bacterial action
(c) They do not dry
(d) They become good in taste
Ans. (b) Salting of pickles and addition of sugar to jams prevent their decay by microbes, or the later get killed due to plasmolysis or due to high concentration of salt or sugar.
(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. (183)
(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. (104)
(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 …
