451. The first biosphere reserve that was set up in India in 1986 is-
1. Nanda Devi
2. Nilgiris
3. Nokrek
4. Manas
Option “2” is correct. The Nilgiri Biosphere Reserve is an International Biosphere Reserve in the Western Ghats and Nilgiri Hills ranges of South India. It was constituted as first Biosphere Reserve by UNESCO in September 1986 under Man and Biosphere Programme.
452. Green Revolution was started in-
1. 1960s
2. 1970s
3. 1980s
4. 1990s
Option “1” is correct. Green Revolution Intensive plan of the 1960s to increase crop yields in developing countries by introducing higher-yielding strains of plant and new fertilizers. The scheme began in Mexico in the 1940s, and was successfully introduced in parts of India in 1960s.
453. Neap tides are-
1. Strong
2. Weak
3. Medium
4. Very strong
Option “2” is correct. During the moon’s quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between high and low tides and is known as a neap tide. Neap tides are especially weak tides. They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another (with respect to the Earth).
454. About how much of the world’s dry land area is tropical rainforest?
Option “2” is correct. Tropical forests comprise approximately 7 percent of the earth’s dry land surface (2% of total surface) and sustain over 50 percent of all species. The Amazon River basin contains 20% of the world’s fresh water.
455. Which is the hottest planet in the Solar System?
1. Jupiter
2. Saturn
3. Venus
4. Uranus
Option “3” is correct. Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has the longest rotation period (243 days) of any planet in the Solar System and rotates in the opposite direction to most other planets. It has no natural satellites. Venus is by far the hottest planet in the Solar System, with a mean surface temperature of 735 K (462 °C; 863 °F), even though Mercury is closer to the Sun.
456. Sunda Trench is in-
1. Indian Ocean
2. Pacific Ocean
3. Atlantic Ocean
4. Gulf of Mexico
Option “1” is correct. Sunda Trench is the second deepest trench in the Indian Ocean and is located several hundred kilometers off of the southern and western shores of Indonesia.
457. The wild ass is found in-
1. Kutch
2. Assam
3. Jammu and Kashmir
4. Tamil Nadu
Option “1” is correct. The wild ass is locally known as ghudkhar and found only in the Little Rann of Kutch in Gujarat in India.
458. The constellation Ursa Major’ is known as –
1. Seven Monks
2. Alpha Centauri
3. Great bear
4. Small Bear
Option “3” is correct. The constellation Ursa Major is known as the Great Bear.
459. The study of relation of animals and plants to their surroundings is called__________.
1. Ecology
2. Ethrology
3. Genealogy
4. Iconology
Option “1” is correct. Ecology is the study of the relationships between plants, animals, people, and their environment, and the balances between these relationships.
460. The impact of Green Revolution was felt most in the case of-
1. Wheat
2. Rice
3. Pulses
4. Oil seeds
Option “1” is correct. Green Revolution impact is mostly felt on wheat.The Green Revolution in India refers to a period when agriculture in India improved due to the adoption of novel methods and technology in agriculture.
