Plasmolysis in plant cell is defined as
(1) Breakdown of plasma membrane in hypot onic medium. (2) Shrinkage of protoplasm in hypertonic medium. (3) Shrinkage of nucleoplasm. (4) Breakdown of nuclear memebrane.
What happens when a cell placed in hypertonic solution ?
(1) Endosmosis (2) Exosmosis (3) Deplasmolysis (4) Imbibition
Organisms lacking nuclear membrane and cell organelles is called as :
(1) Prokaryotes (2) Eukaryotes (3) Protozoa (4) Virus
Selective Permeability means .......... (1) it allows entry of certain substances only. (2) it allows exit of certain substances only. (3) it allows passage of all solutes and solvents. (4) it allows entry and exit of certain substances and prevents remaining substances.
It has been found that people living in very high mountain have many more RBC's in their blood than people living in plains. Which one of following reason is correct? (1) The cold climate stimulates the production of RBC's to keep the bodywarm. (2) People of high mountains breathe more quickly (3) The low air pressure requires more RBC's to supply oxygen to Body's cells (4) The low air pressure in high mountains speeds up the blood circulation so that more RBC's are needed
