Gases that trap heat in the atmosphere are called green house gases. Global Warming Potentials (GWPs) are used to compare the abilities of different green house gases to trap heat in the atmosphere. Carbon dioxide is used as the base for all the calculations, so its global warming potential is 1.2. The higher the GWP, the more heat the specific gas can keep in the atmosphere. Fluorinated gases : Chlorofluorocarbons, Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride : are synthetic, powerful greenhouse gases that have highest heat trapping abilities. These gases are 1,000; 10,000 even 20,000 times more powerful than Carbon dioxide (CO₂) at trapping heat and many can stay in our atmosphere for thousands of years. Green GWPAfter GWPAfter house Gas 20 years 20 years Carbon Dioxide 1 1 Methane 72 25 Nitrous Oxide 289 298 HCFC–22 5160 1810 HFC–23 12000 14800 HFC–125 6350 3500 HFC–134a 3830 1430 HFC–143a 5890 4470 CF4 5210 7390 C2F6 8630 12200 SF6 16300 22800

Correct Option: A

Gases that trap heat in the atmosphere are called green house gases. Global Warming Potentials (GWPs) are used to compare the abilities of different green house gases to trap heat in the atmosphere. Carbon dioxide is used as the base for all the calculations, so its global warming potential is 1.2. The higher the GWP, the more heat the specific gas can keep in the atmosphere. Fluorinated gases : Chlorofluorocarbons, Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride : are synthetic, powerful greenhouse gases that have highest heat trapping abilities. These gases are 1,000; 10,000 even 20,000 times more powerful than Carbon dioxide (CO₂) at trapping heat and many can stay in our atmosphere for thousands of years. Green GWPAfter GWPAfter house Gas 20 years 20 years Carbon Dioxide 1 1 Methane 72 25 Nitrous Oxide 289 298 HCFC–22 5160 1810 HFC–23 12000 14800 HFC–125 6350 3500 HFC–134a 3830 1430 HFC–143a 5890 4470 CF4 5210 7390 C2F6 8630 12200 SF6 16300 22800

Biofortification is the breeding crops to increase their nutritional value. This can be done either through conventional selective breeding or genetic engineering. Biofortification differs from ordinary fortification because it focuses on making plant foods more nutritious as the plants are growing, rather than having nutrients added to the foods when they are being processed.

Correct Option: A

Biofortification is the breeding crops to increase their nutritional value. This can be done either through conventional selective breeding or genetic engineering. Biofortification differs from ordinary fortification because it focuses on making plant foods more nutritious as the plants are growing, rather than having nutrients added to the foods when they are being processed.

Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C).B-complex vitamins and vitamin C are water-soluble vitamins that are not stored in the body and must be replaced each day. These vitamins are easily destroyed or washed out during food storage and preparation.

Correct Option: B

Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C).B-complex vitamins and vitamin C are water-soluble vitamins that are not stored in the body and must be replaced each day. These vitamins are easily destroyed or washed out during food storage and preparation.

Tortoises generally have one of the longest lifespans of any animal. Some individuals are known to have lived longer than 150 years. Galapagos giant tortoise has life span of 190 years.Because of this, they symbolize longevity in some cultures, such as China.

Correct Option: B

Tortoises generally have one of the longest lifespans of any animal. Some individuals are known to have lived longer than 150 years. Galapagos giant tortoise has life span of 190 years.Because of this, they symbolize longevity in some cultures, such as China.

Bulbs like garlic and onion store food in the form of sugar (sucrose) rather than starch. . This is also true of sugar beet, sugarcane, etc. In onions, the food is stored in leaves. However, in most plants, starch is stored as food. Cellulose is not a food for plants but a building material.

Correct Option: D

Bulbs like garlic and onion store food in the form of sugar (sucrose) rather than starch. . This is also true of sugar beet, sugarcane, etc. In onions, the food is stored in leaves. However, in most plants, starch is stored as food. Cellulose is not a food for plants but a building material.