Biology
Fill in the blanks by choosing the correct alternative from those given in brackets.
(a) When placed in a more concentrated solution, the cell contents will …………… (shrink / swell up).
(b) The pressure by which the …………… molecules tend to cross the semi-permeable membrane is called osmotic pressure. (salt / water)
(c) Active transport is in a direction …………… to that of diffusion. (opposite / same)
Related Questions
Give the equivalent terms for the following:
(a) Pressure exerted by the cell contents on the cell wall.
(b) The condition in which the cell contents are shrunken.
(c) Loss of water through a cut stem.
Complete the following statements:
(a) Hypotonic solution is one in which the solution kept outside the cell has …………… solute concentration than inside the cell.
(b) Active transport is one in which the ions outside the roots move in by utilising …………… .
(c) The bending movements of certain flowers towards the sun and the sleep movements of certain plants at night are examples of …………… .
Match the items in column I with those in column II
Column I Column II (a) Xylem (i) semi-permeable (b) Phloem (ii) permeable (c) Cell membrane (iii) downward flow of sap (d) Root pressure (iv) upward flow of water (e) Cell wall (v) guttation Differentiate between Plasmolysis and Deplasmolysis