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Name the body part modified for food storage in the following 

(a) Carrot

(b) Colocasia

(c) Sweet potato

(d) Asparagus 

(e) Radish

(f) Potato

(g) Dahlia

(h) Turmeric

(i) Gladiolus

(j) Ginger

(k) Portulaca 

(a) Carrot- Tap Root

(b) Colocasia- Stem (corm)

(c) Sweet potato- Adventitious tuberous roots 

(d) Asparagus- Adventitious tuberous roots 

(e) Radish- Fusiform Roots

(f) Potato- Stem

(g) Dahlia- Adventitious tuberous roots

(h) Turmeric- Stem (Rhizome)

(i) Gladiolus- Stem (corm)

(j) Ginger- Stem

(k) Portulaca- Adventitious Roots

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Posted by

Safeer PP

Match the following and choose the correct option.

Column I                                         Column II

A. Aleurone layer                         i. without fertilisation

B. Parthenocarpic fruit.                ii. Nutrition

C. Ovule                                      iii. Double fertilisation

D. Endosperm                              iv. Seed

Options:

a. A-i, B-ii, C-iii, D-iv

b. A-ii, B-i, C-iv, D-iii

c. A-iv, B-ii, C-i, D-iii

d. A-ii, B-iv, C-i, D-iii

B is the correct answer

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Posted by

Deep

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It is important to make small check dams across the flooded gullies because they

(i) hold water for irrigation

(ii) hold water and prevent soil erosion

(iii) recharge groundwater

(iv) hold water permanently

 

(a) (i) and (iv)

(b) (ii) and (iii)

(c) (iii) and (iv)

(d) (ii) and (iv)

  • It is important to make small check dams across the flooded gullies because they recharge groundwater.
  • These small dams assist in withholding water.  This gives dampness to the vegetation cover, subsequently preventing soil erosion.
  • Therefore, statements (ii) and (iii) are correct.

Hence, option (b) is correct.

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Posted by

infoexpert23

Select the eco-friendly activity among the following.

(a) Using a car for transportation

(b) Using polybags for shopping

(c) Using dyes for colouring clothes

(d) Using windmills to generate power for irrigation

 

  • Eco-friendly means earth-friendly or not harmful to the environment.
  • The car uses petrol or diesel, which is non-renewable. So, it is not eco-friendly.
  • Polybags are non-biodegradable. It is also not eco-friendly
  • Dyes are synthetic chemical compounds, so they are not eco-friendly
  • The wind is a renewable source of energy. So, using windmills to generate power for irrigation is an eco-friendly activity.

Hence, option (d) is correct.

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Posted by

infoexpert23

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Pick the right combination of terms which has no fossil fuel.

(a) Wind, ocean and coal

(b) Kerosene, wind and tide

(c) Wind, wood, sun

(d) Petroleum, wood, sun

  • Fossil fuel is a general term for buried combustible geologic deposits of natural materials formed from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils by exposure to heat and pressure in the earth's crust over hundreds of millions of years.
  • Wind, wood, and sun have no fossil fuel.
  • Coal, petroleum and kerosene are fossil fuels in the given list.

Hence, option (c) is correct.

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Posted by

infoexpert23

Khadins, Bundhis, Ahars and Kattas are ancient structures that are examples for

(a) grain storage

(b) wood storage

(c) water harvesting

(d) soil conservation

  • Khadin is an ingenious construction designed to harvest surface runoff water for agriculture. These are mostly found in Rajasthan.
  • Bundhis are used for water harvesting in Madhya Pradesh and Uttar Pradesh.
  • Ahars are reservoirs with embankments on three sides, mostly found in Bihar.
  • Kattas are temporary check dams built across streams and rivulets found in Karnataka.

All these are still in use today for the conservation of water.

Hence, option (c) is correct.

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Posted by

infoexpert23

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Opposition to the construction of large dams is due to

(a) social reasons

(b) economic reasons

(c) environmental reasons

(d) all the above

Opposition to the construction of large dams by local people is due to social, economic and environmental problems.

The consequences of raising the height of dams are as follows:

  • Environmental: Terrestrial flora and fauna of the area are destroyed completely.  It leads to deforestation and loss of biological diversity.
  • Social: It leads to the dislocation of people and domestic animals living in an area, which causes various social problems. Significant farming areas might be forever lost.
  • Economic: The people are not even given adequate compensation for their losses. This obviously leads to economic problems such as temporary unemployment for people.

Hence, option (d) is correct.

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Posted by

infoexpert23

Groundwater will not be depleted due to

(a) afforestation

(b) thermal power plants

(c) loss of forest, and decreased rainfall

(d) cropping of high water demanding crops

  • Afforestation means the plantation of trees. Groundwater will not be depleted due to afforestation. Trees stabilise groundwater by binding soil particles and preventing erosion, thereby assisting in maintaining the water table.
  • Thermal power plants pollute the groundwater.
  • Loss of forest and decreased rainfall also pollute the groundwater.
  • Most of the groundwater is polluted due to the use of excess water for cropping of high water-demanding crops.

Hence, option (a) is correct.

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infoexpert23

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Arabari forests of Bengal are dominated by

(a) Teak

(b) Sal

(c) Bamboo

(d) Mangrove

  • Sal trees (Shorea robusta) dominate the Arabari forests of Bengal.
  • With the dynamic and willing support of the local community, these forests went through an astounding recovery by 1983.
  • This forest is divided into the upper Gangetic Plains and moist deciduous forests.
  • The Arabari forest range is found in the West Midnapore district of West Bengal, which continues with the Dalma range of East Singhbhum in the state of Jharkhand.

Hence, option (b) is correct.

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Posted by

infoexpert23

Select the wrong statement.

(a) Forests provide a variety of products

(b) Forests have greater plant diversity

(c) Forests do not conserve soil

(d) Forests conserve water

Forests are the major sites for the conservation of soil. The roots of trees firmly hold the soil particles to protect them from flowing away. The humus is more abundant in the soil of forests. Forests provide a variety of products, e.g., timber, paper, etc. They have greater plant diversity as different types of plants are naturally present. Forests also help in the conservation of water. Forest cover helps to conserve soil and prevent soil erosion. The growth of more trees protects the topsoil from getting exposed to strong winds that may cause soil erosion. Forests also act as a diverse source which provides food, shelter, medicines as well as raw material for industries. So the (C) statement is wrong.

Hence, the answer is the option (c).

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Posted by

infoexpert23

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