CHAPTER 11: TRANSPORT IN PLANTS

The translocation of organic solutes in sieve tube members is mainly supported by

Stomata of a plant open due to

Which of the following is used to determine the transpiration rate of plants?

Which of the following criteria does not relate to facilitated transport?

Bidirectional translocation of solutes takes place in

Which of the following statements is/are not incorrect?

(i) Water and minerals, and food are generally moved by a mass or bulk flow system.

(ii) Bulk flow can be achieved either through a positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient.

(iii) The bulk movement of substances through the conducting tissues of plants is called translocation.

(iv) Xylem translocates organic and inorganic solutes, mainly from roots to the aerial parts of the plants.

(v) Phloem translocates water, mineral salts, some organic nitrogen and hormones, from the leaves to other parts of the plants.

If a cell A with D.P.D. 4 bars is connected to cell B, C, D whose O.P. and T.P. are respectively 4 and 4, 10 and 5 and 7 and 3 bars, the flow of water will be

Minerals are known to enter the plant root by means of a number of mechanisms, including all except one of the following. Which one of the following is NOT a mechanism for moving minerals into roots?

A botanist discovered a mutant plant that was unable to produce materials that form casparian strip. This plant would be

The pathway of water from soil upto the secondary xylem

Osmosis is a form of diffusion in which

Turgor pressure become equal to the wall pressure when

The capacity of the Venus fly trap to catch insects is due to