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The correct answer is Genetic, species and ecosystem

Explanation:

The three levels of biodiversity are widely recognized as:-

• Genetic Diversity: Refers to the variety of genetic information within and between populations of species. It includes the different genes and combinations of genes found within a species, which allows populations to adapt to changing environments and contributes to the overall resilience of species.
• Species Diversity: Refers to the variety of species within a habitat or a region. This includes the number of different species (species richness) and the relative abundance of each species (species evenness). High species diversity often indicates a healthy, resilient ecosystem.
• Ecosystem Diversity: Refers to the variety of ecosystems in a particular area. This includes the different habitats, biological communities, and ecological processes, as well as the variation within individual ecosystems.

Therefore, the correct answer is Genetic, species and ecosystem

The correct answer is Decrease in solubility on decreasing pressure

Explanation:

• Decrease in solubility on decreasing pressure: Carbon dioxide (CO₂) is dissolved in soda water under high pressure.

When the bottle is sealed, the gas remains dissolved due to this pressure.

However, upon opening the bottle, the pressure is released, reducing the solubility of CO₂ in the water, causing it to escape as bubbles, producing the fizz.

 Key Points

• Solubility and pressure: The solubility of gases in liquids increases with an increase in pressure. This is explained by Henry's Law, which states that at constant temperature, the amount of gas dissolved in a liquid is directly proportional to the partial pressure of the gas above the liquid.
• Release of pressure: When a soda bottle is opened, the external pressure drops to atmospheric pressure, causing a rapid decrease in the solubility of CO₂ in the soda. This results in the escape of CO₂ as fizz.
• Fizz in soda: The characteristic fizz is due to the rapid release of CO₂ gas from the liquid when the pressure is decreased, forming bubbles that rise to the surface.

Thus, the fizz observed when a bottle of soda water is opened is due to the decrease in solubility of carbon dioxide when the pressure is decreased.

The correct answer is Dolphins

Explanation:

• Dolphins are the most intelligent mammals on earth.
• Studies show that they are capable of complex problem solving and have the ability to learn as an individual.
• They can also pass the knowledge onto others.
• Dolphins have highly-developed brains. Research shows that dolphins mirror self-recognition, cultural learning, comprehension of symbol-based communication systems, and an understanding of abstract concepts  comparable to chimpanzees and other great apes.
• Dolphins use echolocation for hunting. They emit "clicks" which work on the principle of echo.
• Dolphins analyzes the echo from the reflected objects as quickly as they keep on swimming.
• Their echolocation can even help them know the kind and size of the objects.

Additional InformationWhales:

• Whales, particularly certain species like orcas and humpbacks, exhibit complex social structures, sophisticated hunting techniques, and vocalizations that may resemble a form of language. They also demonstrate behaviors that suggest cultural transmission of knowledge.
• Key Examples: Orcas use coordinated hunting strategies and appear to pass on specific hunting skills to their young.

Elephants:

• Elephants are known for their strong memory, social complexity, and emotional depth. They demonstrate behaviors such as mourning their dead, using tools, and showing cooperative problem-solving. Elephants also display self-awareness, as evidenced by mirror tests.
• Elephants have been observed using branches to swat flies or scratching themselves, as well as understanding complex tasks in experimental settings.

Kangaroo:

• While kangaroos are social animals with some capacity for problem-solving, their cognitive abilities are not as extensively documented or considered as advanced as those of whales, dolphins, or elephants. They have not shown the same levels of tool use, complex communication, or self-awareness in studies available to date.

The correct answer is Insects

Explanation:

• Entomology is the scientific study of insects.
• The term "Entomology" is derived from the Greek words "Entomon," meaning "insect," and "logia," which means "the study of."
• Entomologists, those who study entomology, explore various aspects of insect life, including their classification, life cycle, distribution, behavior, and their impact on the environment and human life

Behaviour of Human Beings:

• This is studied in the fields of psychology and sociology, not entomology.

The Origin and History of Technical and Scientific Terms:

• This area of study falls under etymology, not entomology. Etymology is the study of the origin of words and how their meanings have evolved over time.

The Formation of Rocks:

• This is the realm of geology, specifically a subfield called petrology.

Additional Information

The correct answer is Gigahertz.

Key Points 

• The speed of a computer is measured in terms of its processor (CPU) clock speed.
• Clock speed determines how quickly the CPU retrieves and interprets instructions.
• Clock speeds are measured in gigahertz (GHz).
• A higher number indicates a higher clock speed.
• For example, a CPU with a clock speed of 3.5 GHz can complete 3.5 billion cycles per second.
• The clock speed is determined by a crystal oscillator in the computer.
• This oscillator provides a signal known as the clock signal.
• The clock signal sets the pace for the CPU to complete one cycle.
• For instance, a CPU operating at 1 GHz completes 1 billion cycles per second.

The correct answer is Silicon.

Key Points

• The full form of IC Chips is integrated circuit chips.
• It is made up of semiconductor material which is normally silicon.
• It is called an integrated circuit because the components, circuits, and base material are all made together, or integrated, out of a single piece of silicon, as opposed to a discrete circuit in which the components are made separately from different materials and assembled later.
• The first monolithic IC chip was invented by Robert Noyce of Fairchild Semiconductor.

Additional Information

• The period of the third generation was from 1965-1971. The computers of the third generation used Integrated Circuits (ICs) in place of transistors.
• A single IC has many transistors, resistors, and capacitors along with the associated circuitry.

The correct answer is All of these.

Key Points

• Computer systems include the computer along with any software and peripheral devices that are necessary to make the computer function.
• The complete computer system is made up of the CPU, memory, and related electronics (hardware), all the peripheral devices connected to it, and its operating system (software).

The correct answer is All of these.

Key Points

• The central problem of the economy 
• What is produced and in what quantities?
• For whom are these goods produced?
• How are these goods produced?
• It depends on the society on how many and which types of goods are to be produced. Whether to produce more of food, clothing, and housing or to have more luxury goods. Whether to have more agricultural goods or to have industrial products and services. Whether to use more resources in research and health or to use more resources in building military services.
• Every society has to decide the method and factors of production for each of the different goods and services. Whether it'll be labor-intensive or more machine-intensive. Which of the available technologies to adopt in the production of each of the goods?
• How allocation of goods is done in an Economy. Who gets more and who gets less? Whether or not to ensure a minimum amount of consumption for everyone in the economy. Whether or not elementary education and basic health services should be available freely for everyone in the economy.
• Hence the central problem of the economy involves all the options above.

The correct answer is Tirtha

• The group of 18 officers of Chandragupta Maurya was called the Tirthas.
• They were high-ranking officials who played a key role in the Mauryan administration, advising the emperor and overseeing various administrative functions.
• This elite group was crucial for efficient governance, although primary texts like the Arthashastra do not explicitly mention the term 'Tirthas,' their role in the bureaucracy is well-documented through historical sources.

The correct answer is iv, i, ii, iii

Key Points

• The correct chronological order is:
• Russian Revolution: 1917
• Soviet invasion of Afghanistan: 1979
• Fall of the Berlin Wall: 1989
• Disintegration of the Soviet Union: 1991