CTET GK Questions 2026

The Sun is about 149.6 million kilometres from the Earth, a distance called one astronomical unit, and light travels about three lakh kilometres in a second.

Venus is wrapped in a very thick atmosphere of carbon dioxide, which lets sunlight in but does not let the heat escape.

DDT and mercury compounds are not broken down in the body and are not excreted, so they build up in the tissues of every organism that takes them in and are passed on to whatever eats it.

Gross primary productivity is the total amount of energy that producers fix by photosynthesis. Plants use a part of it for their own respiration, and what remains stored in plant bodies is the net primary productivity.

In a pond the producers are phytoplankton, tiny floating plants whose total weight at any one moment is small. They multiply very rapidly, however, so over time they can feed a far greater mass of zooplankton and fish.

Bears, crows, pigs and human beings eat both plant and animal food, which allows them to occupy more than one trophic level at the same time and makes them a good example of why food webs, rather than single food chains, describe nature better.

Detritus is dead organic matter such as fallen leaves, dead bodies and animal waste. Organisms like earthworms, termites, bacteria and fungi feed on it, and they in turn are eaten by small birds and other animals.

Energy enters an ecosystem as sunlight, is fixed by green plants, and then moves from producers to herbivores, to carnivores and finally to decomposers.

They feed on dead bodies, fallen leaves and waste matter, break the complex organic substances into simple ones and release nutrients back into the soil, water and air, where plants can take them up again.

Energy is lost as heat at every transfer from one trophic level to the next, so a higher level can never hold more energy than the level below it.

It says that only about ten per cent of the energy present at one trophic level is passed on to the next, since the rest is used in respiration and other life processes and is lost to the surroundings as heat.

Green plants make their own food from carbon dioxide and water by photosynthesis, using the energy of sunlight, so they are also called autotrophs.

The British botanist Arthur George Tansley used the word ecosystem in 1935 for a unit in which living organisms and their non-living surroundings are treated together as one system exchanging energy and matter.

In a food chain each step at which energy is transferred is a trophic level, and secondary consumers stand at the third step.

The President said the country is moving ahead with the national goal of building a developed India by that year, a hundred years after independence, and described what such a country would look like: quality education and healthcare reaching everyone, science and technology used for human welfare, equality of opportunity…

The President attended the 75th annual convocation of the Maharaja Sayajirao University of Baroda in that city, and the university takes its name from the ruler of the former princely state of Baroda, which is the older name of Vadodara itself.

She attended the 75th annual convocation ceremony of the Maharaja Sayajirao University of Baroda at Vadodara in Gujarat and addressed the graduating students, telling them that education will be meaningful only if the country and society benefit from it.

Under the Viksit Bharat Challenge, participants climb through an Essay Challenge, District Championships and State or Union Territory level rounds, and the winners reach the national Viksit Bharat Young Leaders Dialogue held in the capital from 10 to 12 January 2027.

Prime Minister Narendra Modi launched Mera Yuva Bharat on that date, setting it up as a technology-enabled platform through which young Indians could join the country's development journey.

Mera Yuva Bharat, or MY Bharat, is the national youth engagement platform of the Department of Youth Affairs within that ministry, and it has now gone past 3 crore registered youth in under three years.