What was used to grind grains in early settlements?

Explanation: Quern stones were used to grind grains into flour.

Q: What converters are used on motor vehicles to break down pollutants in exhaust to non-toxic compounds?
Ans: catalytic converters

Q: Which movement protested the Jallianwala Bagh massacre?
Ans: Non-Cooperation Movement

Q: Where has the 'Tarvat Prahar' exercise been organized?
Ans: Ladakh

Q: Who founded the Tughlaq dynasty?
Ans: Ghiyasuddin Tughlaq

Q: What are living things that produce food for themselves and other organisms called?
Ans: refiners

Q: The small amount of energy input necessary for all chemical reactions to occur is called what?
Ans: activation energy

Q: In which state was the endangered Mainland Sero recently spotted?
Ans: Assam

Q: Which of the following is a complication of improper Virechana?
Ans: Raktasrava

Q: How does a sexually transmitted infection spread?
Ans: sexual contact

Q: A collapsing nebula leads to what process?
Ans: chemical reaction

Q: What is the process of soil dissolving in rain called?
Ans: erosion

Q: What was the expected trend for U.S. search advertising in 2025?
Ans: Double-digit growth

Q: As per information on January 18, 2025, which player scored the first century of 2025?
Ans: Kushal Perera

Q: Channel proteins form what in the membrane?
Ans: atoms

Q: What phase does the nuclear envelope begin to break down?
Ans: interphase