Tag: conservation of forest and wildlife

Questions Related to conservation of forest and wildlife

The exotic species, which when introduced in India became notorious weed, is

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Lantana camara

  2. Eichhornia crassipes

  3. Parthenium hysterophorus

  4. all of these.

Show answer
Correct Option: D
Explanation:

Native to South America, Lantana camara was brought to India by the British as ornamental plants, possibly as long as 200 years ago. Forest officials in different parts of the country have watched helplessly as the invasive plant has spread, and efforts to contain it have gone largely in vain.

Eichhornia crassipes, commonly known as common water hyacinth, is an aquatic plant native to the Amazon basin, and is often a highly problematic invasive species outside its native range. It was introduced in Bengal in India because of its beautiful flowers and shapes of leaves, but turned out to be an invasive weed draining oxygen from the water bodies and resulted in death of many fish. Fish is a supplement food in Bengal, and because of the fish scarcity in Bengal caused by Eichhornia, the water hyacinth is also called "Terror of Bengal".
Parthenium hysterophorus is a species of flowering plant in the aster family, Asteraceae. It is native to the American tropics. Parthenium hysterophorus invades disturbed land, including roadsides. It infests pastures and farmland, causing often disastrous loss of yield, as reflected in common names such as famine weed. In some areas, heavy outbreaks have been ubiquitous, affecting livestock and crop production, and human health. As an invader it first appeared as a contaminant in imported wheat. Indian National Congress decided to import wheats from USA. The wheat was of inferior quality and was a controversial one. This weed is equally dangerous for all flora and fauna. It is highly dangerous for humans. It sucks the nutritious substances from soils, thus converting fertile ground into infertile ones.
So the correct option is 'all of these'.

Weeds tend to compete with the crops for _____

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Food

  2. Space

  3. Light

  4. All of the above

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Correct Option: D

If pests and weeds are not controlled at proper time ______

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. They can destruct the crops so much that most of the crop is lost

  2. They can destruct the crops so much that most of the crop is no effect

  3. They can destruct the crops so much that most of the crop is gain

  4. None of these

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Correct Option: A

In fact weeds _____

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Take up all the nutrients

  2. Reduce the growth of crop in various ways

  3. Above both options are correct

  4. None of the above

Show answer
Correct Option: C

Removal of weeds from cultivated fields during the early stages _____

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Crop growth is essential for a good harvest.

  2. Just for spending time

  3. For new crop

  4. None of these

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Correct Option: A

Weeds take up nutrients and ______ the growth of the crop

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Reduce

  2. Increase

  3. No change occur

  4. None of these

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Correct Option: A

If weeds and pests are not controlled at the appropriate time then ____

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. They can damage the crops so much that most of the crop is lost

  2. They can increase the crops so much that most of the crop is lost

  3. They can damage the crops so much that most of the crop is gain

  4. None of these

Show answer
Correct Option: A

Which of the following groups include only weeds?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Parthenium, Xanthium and Cyperinus

  2. Xanthium, Parthenium and Maize

  3. Convolvulus, Balsam and Paddy

  4. Amaranthus, Convolvulus and Chenopodium

Show answer
Correct Option: A
Explanation:

Weeds can be defined as the unwanted plants that grow in the field and harm the desired crops. Parthenium is the flowering plant which can cause an allergy is the most important weed of corn and wheat field. Xanthium is the ruderal weed of maize. Cyperinus is the most invasive weed found throughout the world. It is the weed of rice field. 

Which of the following is also called unwanted plants?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Weeds

  2. Shrubs

  3. Grasses

  4. Feeds

Show answer
Correct Option: A
Explanation:

Weeds are the unwanted or undesirable plants as they compete with desirable crops in the field for nutrients, sunlight and interfere with the growth of crops.

So, the correct answer is option A.

Herbicides are chemicals which control

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Insects

  2. Fungi

  3. Weeds

  4. Nematodes

Show answer
Correct Option: C
Explanation:

Herbicides are chemical which control weeds. These are also called as weedicides. Glufosinate ammonium is a broad spectrum herbicides. A 2,4-D (2,4-Dichlorophenoxyacetic acid) is a plant hormone that acts as herbicide. It kills the broadleaf weeds that harm the plants by causing uncontrolled growth in them.

Thus, the correct answer is option C.