In solids, particles are held together by strong intermolecular forces, giving them a definite shape and volume.

In gases, particles move freely and are far apart compared to solids and liquids.

In an elastic collision, both momentum and kinetic energy are conserved.

Mutualism is an interaction where both species involved benefit from the relationship.

Uniform distribution occurs when individuals are evenly spaced, often due to competition for resources.

Logistic growth describes a population that grows rapidly at first and then slows as it approaches the carrying capacity.

In an endothermic reaction, the change in enthalpy is equal to the heat absorbed at constant pressure.

In sexual reproduction, offspring inherit genetic material from both parents, leading to genetic variation.

External fertilization occurs when the sperm and egg unite outside the body, commonly seen in aquatic organisms.

Fertilization occurs in sexual reproduction, where male and female gametes fuse to form a zygote.

Sexual reproduction involves the combination of genetic material from two parents, leading to genetic variation.

Regeneration is a form of asexual reproduction where an organism can regrow lost parts.

Parthenogenesis is a form of asexual reproduction where the offspring develops from an unfertilized egg.

In a meandering river, the velocity of water generally increases downstream due to the decrease in cross-sectional area and increase in gradient.

Covalent network solids are held together by a network of covalent bonds, resulting in very high melting points.

Molecular solids are held together by van der Waals forces.

India achieved a GDP growth rate of 8.4% in the year 2021 as it recovered from the COVID-19 pandemic.

India achieved its highest GDP growth rate of 8.3% in 2019.

India became a member of the United Nations on October 30, 1945.

India became a Republic on January 26, 1950, when the Constitution came into effect.

India celebrated its 75th Independence Day on August 15, 2021.

India gained independence from British rule on August 15, 1947.

India gained independence on August 15, 1947.

'The Communist Manifesto' was published in 1848, outlining the principles of Marxism and advocating for class struggle.

The Berlin Wall fell on November 9, 1989, symbolizing the end of the Cold War.

The Berlin Wall fell on November 9, 1989, marking a significant event in the Cold War.

The European Union received the Nobel Peace Prize in 2009.

The first manned moon landing occurred on July 20, 1969.

The Foreign Contribution (Regulation) Act (FCRA) was introduced in 1976 to regulate the acceptance of foreign funds by NGOs in India.

The Gulf War began on August 2, 1990, when Iraq invaded Kuwait.