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Question

Consider the following activities:

1. Spraying pesticides on a crop field
2. Inspecting the craters of active volcanoes
3. Collecting breath samples from spouting whales for DNA analysis

At the present level of technology, which of the above activities can be successfully carried out by using drones?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer:

D

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Explanation:

Spraying pesticides on a crop field: Drones are utilized in modern agriculture to enhance crop productivity. Unmanned aerial vehicles (UAVs) are employed for pesticide spraying, reducing health risks for humans involved in manual spraying. Drones offer ease of use and overcome the challenges associated with traditional equipment and labor-intensive approaches.

Inspecting the craters of active volcanoes: Drones provide an invaluable means of capturing images of erupting volcanic craters, which would be otherwise difficult or impossible to obtain. They offer quick access to challenging terrain, facilitating the collection of high-quality photogrammetric data in various volcanic environments.

Collecting breath samples from spouting whales for DNA analysis: In 2015, researchers successfully used custom-built drones to gather blow samples, which are the moist breath exhaled by whales, for DNA analysis. This method allows for non-invasive assessment of whale health and genetic diversity.

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