[Mission 2023] Current Affairs Quiz , 24 January 2023

Solution: c)

Dolphins are social mammals that communicate through squeaks, whistles and clicks. They also use echolocation in order to locate food and other objects. Therefore, anthropogenic noise coming from large commercial ships, military sonars or offshore drilling can severely impact their well-being.

Marine animals are known to use sound to navigate, find food and protect themselves. As sound travels faster in water than air, it makes for an important mode of communication because it can convey a lot of information quickly and over long distances. Scientists believe that fish species rely on sounds during reproductive activities, including mate attraction, courtship and mate choice.

However, several studies and incidents have shown that sounds made by drilling, commercial ships and military operations lead to disruption of marine life.

Source

Solution: a)

Taklamakan Desert is a desert in Southwestern Xinjiang in Northwest China.

Solution: b)

The BCG vaccine for TB is 100 years old.

National TB prevalence survey – conducted by Indian Council of Medical Research and WHO 

Considering the country’s goal of achieving TB elimination by 2025, the prevalence was 300 per 100,000, bacteriologically confirmed TB cases.

In India, the main risk factor for TB is undernutrition. This is why we find TB incidence is higher in lower economic groups, especially in tribal and remote rural areas and in the urban poor.

Source

Solution: b)

Iron ore occurs most abundantly in the form of oxides. Other forms are carbonates, hydroxides, sulphides and silicates. It is also found in association with titanium dioxide.

Hematite is the most abundant iron ore mineral and is the main constituent of the iron ore industry in India.

The major Hematite type iron deposits are located in well-defined belts in the States of Odisha, Jharkhand, Chhattisgarh, Maharashtra, Goa and Karnataka.

Solution: d)

The high concentration of iridium in the geological section at Anjar, Kutch district, provides evidence for a massive meteoritic impact that caused the extinction of dinosaurs about 65 million years ago.

A national geological monument exhibiting a unique rock called Nepheline Syenite in Ajmer district of Rajasthan.

Baula-Nausahi, a 3-km-long belt, 170 km north east of Bhubaneswar, is the proven platinum group of elements (PGE) deposit in India. PGE comprises six greyish to silver white metals including platinum, palladium, iridium, rhodium, osmium and ruthenium.