UPSC Prelims Marathon 7th April – Revision – 2024

Which of the following is/are participates in primary succession?
1.Microbes
2.Lichens
3.Mosses
How many of the statements given above are correct?

When succession is brought about by living inhabitants of that community itself, the process is called?

Which of the following area/s is/are tundra ecosystem found?
1.Alaska
2.Canada
3.New Zealand
How many of the statements given above are correct?

Consider the following statements regarding boreal forests:
1.They are characterized by thin podzols.
2.The productivity and community stability of a boreal forest are lower than those of any other forest ecosystem.
Which of the statements given above is/are incorrect?

Consider the following statements:
1.The temperate rain forests exhibit a marked seasonality about temperature and rainfall.
2.The diversity of plants and animals is much lower as compared to the tropical rainforest.
Which of the statements given above is/are correct?

Which of the following is/are characteristic/s of tropical rain forest?
1.The annual rainfall exceeds 200 cm and is generally distributed throughout the year.
2.Soils of tropical rainforests are red latosols.
3.Tropical rain forests are among the most diverse and rich communities on the earth.
How many of the statements given above are correct?

Consider the following statements:
1.Neustons are unattached organisms which live at the air water interface, like floating plants.
2.Nektons contain animals which are swimmers.
Which of the statements given above is/are correct?

Which of the following is/are limiting factors of aquatic ecosystem?
1.Sunlight
2.Oxygen
3.Moisture
How many of the statements given above are correct?

Consider the following statements regarding “bats”:
1.They are social animals.
2.They are the second largest group of mammals after rodents.
Which of the statements given above is/are correct?