Question

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Answer 1

1.

A hybrid crop is a result of two different varieties of plant are cross-pollinated to create an off-spring or hybrid, that contains the best traits of each of the parents. In hybridization, pollination is carefully controlled to ensure that the right plants are crossed to achieve the desired combination of characteristics, such as bigger size or better disease resistance. The process of developing a hybrid typically requires many years. In general, hybrids offer some combination of these favorable traits: dependability, less required care, early maturity, higher yield, improved flavor, specific plant size, and/or better disease resistance. Hybrid vegetables typically look like the veggies you’d find at a supermarket.

2

The frequency of irrigation is much higher in summers due to the water loss from transpiration, which is much greater as compared to other seasons. There's more water loss due to evaporation and transpiration since it's warmer.

3

2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula C8H6Cl2O3 which is usually referred to by its ISO common name 2,4-D.[5] It is a systemic herbicide which selectively kills most broadleaf weeds by causing uncontrolled growth in them but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.

2,4,5-Trichlorophenoxyacetic acid (also known as 2,4,5-T), a synthetic auxin, is a chlorophenoxy acetic acid herbicide used to defoliate broad-leafed plants. It was developed in the late 1940s and was widely used in the agricultural industry until being phased out, starting in the late 1970s due to toxicity concerns. Agent Orange, a defoliant used by the British in the Malayan Emergency and the U.S. in the Vietnam War, was equal parts 2,4,5-T and 2,4-D (2,4-dichlorophenoxyacetic acid).

Answer 2

Answer:

• hybrid varieties of crops are crops  devolped  from the methods of genetic engineering to

1. to give more yield per unit area
2. to reduce post harvest losses
3. increased efficiency of mineral usage
4. to handle abiotic stresses
5. to reduce dependencies on fertilisers

• frequency of water requirement is more in summer as the tempeature is very high thus leading to more evaporation of water .
• 2-4- D  and 2-4-D- T is a synthetic herbicide and a plant growth regulator which is mainly used for killing weeds especially dicots.  these come under a group of plant growth regulators called auxins

Explanation: