The process of watering the crops is called irrigation.
Any two methods of irrigation are:
<h3>(i) Sprinkler system:</h3>
This system is used on the uneven land where less water is available. The perpendicular pipes, having rotating nozzles on top, are joined to the main pipeline at regular intervals. Water is allowed to flow through main pipe under pressure, which escapes from the rotating nozzles. In this way water gets sprinkled on the crop.
<h3> (ii) Drip irrigation:</h3>
This system is used to save water as it allows the water to flow drop by drop at the roots of the plants. It is the best technique for watering fruit plants, gardens and trees. Water is not wasted at all.
None, because molecules are a group of two (or more) electrically bonded atoms. But there are gases not bonded due to their stability.
Answer:
Option b, Phosphodiester bond
Explanation:
Proteins are sequence of amino acids. Two amino acids are joined by peptide bond. Therefore, proteins are also known as sequence of polypeptide chains. These polypeptides chains have four level of structures:
Primary structure
secondary structure
Tertiary structure
Quaternary structure
Primary structure is simply a sequence of amino acids. In secondary, tertiary and Quaternary structure, various interactions are present.
Disulfide bond, hydrogen bond and salt bridge stabilizes tertiary structure of the protein.
Phosphodiester bond is present as link between two nucleotides and thus, present in the backbone of nucleic acid (RNA and DNA)
Therefore, the correct option is option b
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Explanation:
