GS PrelimsEnvironmentPopulation Interaction2008

The release of which one of the following into ponds and wells helps in controlling the mosquitoes?

Crab

Dogfish

Gambusia fish

Snail

Correct Answer: Option C

Explanation

1. Biological control methods are sometimes used for controlling mosquitoes, particularly their larvae. 2. Gambusia fish, commonly known as mosquitofish, are small freshwater fish that feed voraciously on mosquito larvae. 3. The release of Gambusia fish into ponds and wells where mosquitoes breed is a well-known technique to help control mosquito populations by reducing larval numbers. 4. Crabs, Dogfish (a type of shark), and Snails do not typically prey on mosquito larvae effectively.

More Environment PYQs

Regarding Peacock tarantula (Gooty tarantula), consider the following statements : 1. It is an omnivorous crustacean. 2. Its natural habitat in India is only limited to some forest areas. 3. In its natural habitat, it is an arboreal species. Which of the statements given above is/are correct?
Consider the following statements : 1. Statement I: Circular economy reduces the emissions of greenhouse gases. 2. Statement II : Circular economy reduces the use of raw materials as inputs. 3. Statement III : Circular economy reduces wastage in the production process. Which one of the following is correct in respect of the above statements?
Consider the following statements : 1. Statement I: Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions. 2. Statement II : Silica-bearing clay is mixed with limestone while manufacturing cement. 3. Statement III : Limestone is converted into lime during clinker production for cement manufacturing. Which one of the following is correct in respect of the above statements?
Consider the following statements : 1. Statement I: At the 28th United Nations Climate Change Conference (COP28), India refrained from signing the 'Declaration on Climate and Health'. 2. Statement II : The COP28 Declaration on Climate and Health is a binding declaration; and if signed, it becomes mandatory to decarbonize health sector. 3. Statement III : If India's health sector is decarbonized, the resilience of its health-care system may be compromised. Which one of the following is correct in respect of the above statements?
Consider the following statements : 1. Statement I: Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change. 2. Statement II: Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets. 3. Statement III : Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets. Which one of the following is correct in respect of the above statements?
Consider the following statements : 1. Carbon dioxide (CO2) emissions in India are less than 0.5 t CO2/ capita. 2. In terms of CO2 emissions from fuel combustion, India ranks second in Asia-Pacific region. 3. Electricity and heat producers are the largest sources of CO2 emissions in India. Which of the statements given above is/are correct?

View all Environment questions →

Master UPSC Revision

Get 10,000+ topic-wise MCQs, spaced repetition, daily CSAT challenges, and detailed performance analytics.

Coming Soon to Play Store