Tag: conservation of forest and wildlife

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Questions Related to conservation of forest and wildlife

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

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

  1. Lantana camara

  2. Eichhornia crassipes

  3. Parthenium hysterophorus

  4. all of these.
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

If pests and weeds are not controlled at proper time ______

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If weeds and pests are not managed, they compete for resources and damage the crop, leading to significant yield loss.

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

In fact weeds _____

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Weeds reduce crop growth by consuming nutrients and by physically shading or crowding the crop, so both listed options are correct.

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

Removal of weeds from cultivated fields during the early stages _____

  1. Crop growth is essential for a good harvest.

  2. Just for spending time

  3. For new crop

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Removing weeds during early crop growth stages is essential for good harvest because weeds compete most aggressively with young crops. If weeds aren't removed early, they can stunt or kill crop plants before they establish. The sentence structure is awkward, but the meaning is that early weed removal benefits crop growth.

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Weeds compete for resources, and pests eat crops - together they can destroy most of the harvest if uncontrolled. This is why integrated pest management and timely weed control are essential practices in agriculture to prevent catastrophic crop losses.

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

Which of the following groups include only weeds?

  1. Parthenium, Xanthium and Cyperinus

  2. Xanthium, Parthenium and Maize

  3. Convolvulus, Balsam and Paddy

  4. Amaranthus, Convolvulus and Chenopodium
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 

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

Which of the following is also called unwanted plants?

  1. Weeds

  2. Shrubs

  3. Grasses

  4. Feeds
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Herbicides are chemicals which control

  1. Insects

  2. Fungi

  3. Weeds

  4. Nematodes
Reveal answer Fill a bubble to check yourself
C Correct answer
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.