661. The chemical used for destroying fungi in water tanks is –

1. Copper Sulphate
2. Magnesium Sulphate
3. Zinc Sulphate
4. Nitric Acid

Option “1” is correct.
Copper Sulphate is a fungicide used to control bacterial and fungal diseases of fruit, vegetable, nut and field crops. It is chemical used for destroying fungi in water tanks.
662. Which of the following is a Parthenocarpic fruit?

1. Banana
2. Apple
3. Mulberry
4. Strawberry

Option “1” is correct.
Parthenocarpy is the natural or artificially induced production of fruit without fertilization of ovules, which makes the fruit seedless. Banana is a parthenocarpic fruit.
663. Carrot is orange in colour because –

1. It grows in the soil
2. It is not exposed to sunlight
3. It contains carotene
4. The entire plant is orange in colour

Option “3” is correct.
The carrot gets its characteristic and bright orange colour from the pigment called carotene.
664. An example of hormone is –

1. Cytosine
2. Renin
3. Oxytocin
4. Peprin

Option “3” is correct.
Oxytocin is an hormone that is normally produced in the hypothalamus and stored in the posterior pituitary gland.
665. To reduce tooth decay most toothpastes contain a –

1. Bromide
2. Fluoride
3. Iodide
4. Chloride

Option “2” is correct.
Fluoride in toothpastes prevent tooth decay from progressing and can even reverse, or stop, early tooth decay.
666. The part of brain which controls mood and anger in our body is –

1. Hypothalamus
2. Cerebrum
3. Meninges
4. Thalamus

Option “1” is correct.
The brain’s limbic system controls emotional expression through the hypothalamus, which has control over the body’s emotional responses systems. The hypothalamus is responsible for regulating hunger, thirst, response to pain, levels of pleasure, sexual satisfaction, anger and aggressive behavior, etc.
667. An organism that transmits disease from one individual to another is called –

1. Hybrid
2. Fragment
3. Vector
4. Clone

Option “3” is correct.
An organism that transmits a disease agent from an infected to a non-infected animal or plant is known as vector.
668. Which one of the following is an autotroph?

1. Butterfly
2. Algae
3. Grasshopper
4. Mushroom

Option “2” is correct.
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Algae, which live in water and whose larger forms are known as seaweed, is autotrophic.
669. In B.C.G. Vaccine the word ‘C’ stands for:

1. Calmette
2. Cough
3. Chlorine
4. Cadmium

Option “1” is correct.
The acronym BCG stands for Bacillus Calmette-Guerin, a vaccine against tuberculosis and for the treatment of some bladder cancers.
670. Point out the incorrect pair:

1. Green Revolution – Agricultural Development
2. White Revolution – Dairy Development
3. Blue Revolution – Development of Fisheries
4. Golden revolution – Fruit Production

Option “4” is correct.
Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world’s biggest dairy development program.
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