likhoUPSC

Sign in

Home› UPSC CSE› Prelims GS Paper I› 2023 questions› Question 47

UPSC CSE Prelims

Subject: Biology Chapter: Developments In Biology

2023 PYQ

Question 47

'Aerial metagenomics' best refers to which one of the following situations?

Choose one answer ACollecting DNA samples from air in a habitat at one go BUnderstanding the genetic makeup of avian species of a habitat CUsing air-borne devices to collect blood samples from moving animals DSending drones to inaccessible areas to collect plant and animal samples from land surfaces and water bodies

Skip →

View correct answer and explanation

Correct answer: A

Correct Option: A (Collecting DNA samples from air in a habitat at one go) Explanation: Aerial metagenomics captures environmental DNA suspended in air, allowing scientists to detect species present in a habitat without catching them. Option-wise Analysis: A. Correct-sampling airborne eDNA across a habitat is aerial metagenomics. B. Incorrect-Genotyping only birds misses the broad range of airborne DNA from many organisms. C. Incorrect-Collecting blood from animals is invasive sampling, not environmental air DNA. D. Incorrect-Drones collecting ground or water samples are remote sampling, but not specifically airborne DNA metagenomics.

← Previous question Next question →

© 2023 LikhoUPSC · Independent learning website; not affiliated with or endorsed by UPSC.

Previous Year Questions UPSC website NCERT textbooks