Phenyl mercuric acetate (PMA) results in
- reduced photosynthesis
- reduced transpiration
- reduced respiration
- killing of plants.
The Correct Option is B
Solution and Explanation
Top Questions on Transport in Plants
- Correct sequence in water absorption by root hairs.
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Identify and define ‘A’ and ‘B’ in relation to the uptake of water by the root:
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Statement I : In the nephron, the descending limb of loop of Henle is impermeable to water and permeable to electrolytes.
Statement II : The proximal convoluted tubule is lined by simple columnar brush border epithelium and increases the surface area for reabsorption.
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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
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(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
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The output (Y) of the given logic gate is similar to the output of an/a :
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Concepts Used:
Transport in Plants
The two types of conducting tissues that are used to transport the water and minerals in plants such as:
Xylem:
Xylem is a long, non-living tube running from the roots to the leaves via the stem. The water is absorbed by the root hair and goes through cell-to-cell movement by osmosis until it reaches the xylem. This water is then transported throughout the xylem vessels to the leaves and is evaporated by the process of transpiration.
The xylem is also composed of lengthened cells like the phloem. However, the xylem is mainly accountable for transporting water to all plant parts from the roots. Since they serve such a vital function, a single tree would have a lot of xylem tissues.
Phloem:
The phloem is accountable for the translocation of nutrients and sugar like carbohydrates, produced by the leaves to areas of the plant that are metabolically in force. It is powered by living cells. The cell walls of these cells structurize small holes at the ends of the cells known as sieve plates.
Means of Transportation in Plants:
Transportation in plants is by 3 means, they are as follows:
- Diffusion
- Facilitated diffusion
- Active Transport