1. Answer: (d) Goat
Explanation: The goat (Capra hircus) is a domesticated species of goat-antelope typically kept as livestock.
2. Answer: (c) Honey
Explanation: As it's made by bees. Bees will take nectar from flowers to there hive. This nectar will convert into honey. Where Gum , Catechu & Rubber all are produced by trees.
3. Answer: (a) canopy
Explanation: The 'branches of the tall trees' look like a 'roof over the other plants' in the forest are called as 'canopy'
4. Answer: (b) humus
Explanation: The micro-organisms which convert the dead plants and animals to humus are known as decomposers. Decomposers recycle and convert the dead matter into humus which mixes with forest soil and provides necessary nutrients to plants. Thus decomposers help in maintaining the necessary nutrient balance in the soil.
5. Answer: (b) food chain
Explanation: The food chain is the sequence of organisms in which each organism eats the lower member and itself is eaten by a higher member. The food chain starts with the producer or plants that convert solar energy into the usable form of energy (food) by the process of photosynthesis which is then eaten by primary consumers like deer.Primary consumers are eaten by secondary consumers like lions.
6. Answer: (d) Porcupine
Explanation: Fox, Boar and Bison are comparatively larger in size than porcupine.
7. Answer: (c) Furniture industry
Explanation: Industries which are totally dependent upon the products of forests are - Paper Industry, Match Industries , Plywood Industries and Fibre Board Industries.
8. Answer: (a) forests
Explanation: The rainfall will be less in absence of forests.
9. Answer: (c) Kerosene
Explanation: Gum, plywood and sealing wax are forest products whereas Kerosene is a fossil fuel. So,it's not a forest product. Gums are obtained from the woody elements of plants or in seed coatings.
10. Answer: (b) Village
Explanation: Its because in a village every thing in naturally set. There is no much noise pollution as compare to city. People in the village share their things to each other and help one another in times of need.
11. Answer: (b) crown
Explanation: The branchy part of a tree above the stem is known as Crown.Herbs are the medicinal plants.
12. Answer: (a) Cinchona
Explanation: Malaria is caused by infection with unicellular eukaryotic parasites of the genus Plasmodium. The species Plasmodium falciparum is responsible for the most life-threatening malarial disease.Quinine extracted from the bark of the cinchona tree is used as an antimalarial agent.Hence, the cinchona tree is used to cure malaria.
13. Answer: (d) Salt
Explanation: We get salt from sea water along the beaches and not in forests.
14. Answer: (b) Snake
Explanation: In this flow of the food chain, among the other options snake suits the best.
15. Answer: (a) Green lungs
Explanation: Forests are called lungs of nature because they are source of oxygen in the atmosphere. The plants release oxygen through the process of photosynthesis. The plants help to provide oxygen to animals for respiration. They also maintain the balance of oxygen and carbon dioxide in the atmosphere. That is why forests are called green lungs.
16. Answer: (a) Forests
Explanation: Afforestation involves the planting of trees in a drainage basin to increase interception and storage while reducing surface runoff. This reduces a rivers discharge and so makes it less likely to flood. Afforestation also prevents mass wasting which reduces the amount of soil entering the river and keeps the rivers capacity high. When combined with floodplain zoning, afforestation can be very effective at reducing the risk of flooding. Planting trees help prevent erosion because the roots bind the soil.
17. Answer: (C) Deforestation
Explanation: Cutting down trees on a large scale is called deforestation, which is done majorly for commercial purposes such as to start big industries by clearing the land.
18. Answer: (a) trap heat of the sun
Explanation: Earth's greenhouse gases trap heat in the atmosphere and warm the planet. The main gases responsible for the greenhouse effect include carbon dioxide, methane, nitrous oxide, and water vapor (which all occur naturally), and fluorinated gases (which are synthetic).
19. Answer: (a) roots
Explanation: After a period of heavy rainfall, it is important to keep an eye out for root rot. Root rot occurs when an excess amount of water prevents the soil from draining properly and as a result, the roots do not receive enough oxygen and die.
20. Answer: (c) decomposers
Explanation: Micro-organisms that break down the complex organic compounds present in dead plants and animals and their products, such as faeces and urine, into simpler substances are called decomposers.
21. Answer: (c) Russia
Explanation: Russia is the largest producer of fuel wood in the world because Russia has the largest cover of forests.
22. Answer: (b) pollination
Explanation: The insects, butterflies help flowering plants in pollination.
23. Answer: (b) thermocol
Explanation: Thermocol is not prepared from the wood obtained from the forest. Paper, matchsticks and plywood are prepared from the wood.
24. Answer: (b) Dodo
Explanation: The dodo (Raphus cucullatus) is an extinct flightless bird that was endemic to the island of Mauritius, east of Madagascar in the Indian ocean. It became extinct in 14th century from Mauritius because of large-scale hunting. Dodo was helpful in pollinating and propagating seed of this tree species. Subfossil remains show the dodo was about 1 metre (3 ft 3 in) tall and may have weighed 10.6–21.1 kg (23–47 lb) in the wild.
25. Answer: (d) Willow
Explanation: Cricket Bat Willow is the type of wood used for the manufacture of professional cricket bats all across the globe because it is the only wood that can provide the strength and compression required for the cricket ball. Another variety of willow used for making bats is the Kashmir willow.
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