List-I | List-II |
A. China rose | I. Free central |
B. Mustard | II. Basal |
C. Primrose | III. Axile |
D. Marigold | IV. Parietal |
Match List I with List II.
List I | List II | ||
A | Heroin | I | Effect on cardiovascular system |
B | Marijuana | II | Slow down body function |
C | Cocaine | III | Painkiller |
D | Morphine | IV | Interfere with transport of dopamine |
Choose the correct answer from the options given below:
Given below are two statements:
Statement I: The forces generated transpiration can lift a xylem-sized column of water over 130 meters height.
Statement II: Transpiration cools leaf surfaces sometimes 10 to 15 degree evaporative cooling.
In the light of the above statements, choose the most appropriate answer from the options given below:
Match List I with List II:
List-I | List-II | ||
(a) | Cohesion | (i) | More attraction in liquid phase |
(b) | Adhesion | (ii) | Mutual attraction among water molecules |
(c) | Surface tension | (iii) | Water loss in liquid phase |
(d) | Guttation | (iv) | Attraction towards polar surfaces |
Choose the correct answer from the options given below:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
The two types of conducting tissues that are used to transport the water and minerals in plants such as:
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.
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.
Transportation in plants is by 3 means, they are as follows: