Biology TRUE / FALSE

False.
Dry seeds when submerged in water swell up due to imbibitions. On contact with water dry seeds imbibe water and swell up.

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.

False.
The leaves of the twig remain turgid since its xylem is intact and xylem is responsible for water conduction in plants.

True.
Yes, it is true that soaked seeds burst three seed coat layers for germination. In some plants, the seeds are covered by a three-layered seed coat containing the surface layer, middle layer, and inner layer. So, when they are soaked in water, water is imbibed into the seeds and seeds swell up exerting pressure on the seed coat and burst the seed coats.

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.

True.
Plasmolysis occurs due to outflow of water from the cell when placed in 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 hypotonic solution due to which the protoplasm again swells up pressing tight against the cell wall.

True
Explanation : A differentially permeable membrane allows small particles to pass through but blocks the larger ones. The cell wall of the root cell is a differentially permeable membrane because it gives passage to certain salts and solutes but blocks the passage of soil particles surrounding it in case of root cells.

(a) False
(b)The shrinkage of protoplasm, when a cell is kept in hypertonic solution.
Explanation : he protoplasm of a cell shrinks due to exosmosis of water which occurs in hypertonic solution whereas; a cell is kept in hypotonic solution swells up due to endosmosis of water.

True
Explanation :The vascular bundle is the system of plants regarding the conduction of food, water, and minerals. It consists of two parts xylem, which is the water-conducting tissue, and the phloem, which is concerned with the conduction of food (glucose).

(a) False
(b)Cells that have lost their water content are said to be plasmolysed.
Explanation :Cells that have regained their water content after being plasmolysed are said to be deplasmolysed.

(a) False
(b) Addition of salt to pickles prevents growth of bacteria because they turn flaccid.
Explanation:Addition of salt to pickles increases the concentration and when bacterias come in contact it undergoes exosmosis and thus becomes flaccid or plasmolysed leading to its death.

(a) False
(b) A plant cell placed in hypotonic solution gets turgid.
Explanation :A plant cell placed in hypertonic solution gets plasmolysed due to exosmosis and when placed in hypotonic solution gets turgid due to endosmosis.

true

FALSE, the cells that have lost their water content are said to be plasmolysed.

FALSE, Plasmolysis makes the cell flaccid.

true

FALSE, plasma membrane permits the passage of certain substances as it is semipermeable in nature.

FALSE, osmosis is defined as the movement of water from a dilute sugar solution to a concentrated sugar solution through a semi-permeable membrane.

true