Mention whether the following statements are true (T) or false (F) and give explanation in support of your answer.
(a) Plasmolysis is reverse of deplasmolysis. (T/F)
(b) Guttation is another name for bleeding in plants. (T/F)
(c) Soaked seeds burst their seed coats. (T/F)
(d) If the phloem of a twig is removed keeping the xylem intact, the leaves of a twig wilt. (T/F)
(e) Guttation in plants occurs maximum at mid-day. (T/F)
(f) Dry seeds when submerged in water swell up due to endosmosis. (T/F)
Mention whether the following statements are true (T) or false (F) and give explanation in support of your answer.
(a) Plasmolysis is reverse of deplasmolysis. (T/F)
(b) Guttation is another name for bleeding in plants. (T/F)
(c) Soaked seeds burst their seed coats. (T/F)
(d) If the phloem of a twig is removed keeping the xylem intact, the leaves of a twig wilt. (T/F)
(e) Guttation in plants occurs maximum at mid-day. (T/F)
(f) Dry seeds when submerged in water swell up due to endosmosis. (T/F)
(a) True.
Plasmolysis occurs due to the outflow of water from the cell when placed in a hypertonic solution due to which the cytoplasm shrinks away from the cell wall. On the other hand, deplasmolysis is the result of the re-entry of water into the plasmolysed cell when placed in a hypotonic solution due to which the protoplasm again swells up pressing tight against the cell wall.
(b) False.
Guttation is the process by which drops of water appear along leaf margins due to excessive root pressure whereas bleeding is the loss of cell sap through a cut stem.
(c) False.
There is only one seed coat in a seed.
(d) False.
The leaves of the twig remain turgid since its xylem is intact and xylem is responsible for water conduction in plants.
(e) False.
Guttation occurs due to excessive root pressure. It is maximum when root pressure is maximum which occurs in the early mornings or at night. This is because, during these times, transpiration is very low and water absorption is very high.
(f) False.
Dry seeds when submerged in water swell up due to imbibitions. On contact with water dry seeds imbibe water and swell up.
(a) True.
Plasmolysis occurs due to the outflow of water from the cell when placed in a hypertonic solution due to which the cytoplasm shrinks away from the cell wall. On the other hand, deplasmolysis is the result of the re-entry of water into the plasmolysed cell when placed in a hypotonic solution due to which the protoplasm again swells up pressing tight against the cell wall.
(b) False.
Guttation is the process by which drops of water appear along leaf margins due to excessive root pressure whereas bleeding is the loss of cell sap through a cut stem.
(c) False.
There is only one seed coat in a seed.
(d) False.
The leaves of the twig remain turgid since its xylem is intact and xylem is responsible for water conduction in plants.
(e) False.
Guttation occurs due to excessive root pressure. It is maximum when root pressure is maximum which occurs in the early mornings or at night. This is because, during these times, transpiration is very low and water absorption is very high.
(f) False.
Dry seeds when submerged in water swell up due to imbibitions. On contact with water dry seeds imbibe water and swell up.
