Explanation

Chromatography is one of the latest techniques, which is used to separate the colored components of a mixture.

Ink is a mixture of several dyes

therefore we can separate those colors from one another using chromatography.

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ND20-1-2023

Explanation

The fog in winter is caused by a combination of:

• Suspended water droplets (condensation)
• Dust particles in the air
• Smoke (from human activities or natural sources)

Explanation

Epinephrine (adrenaline) is used as a bronchodilator to treat asthma

They as a heart stimulant in emergencies, such as during cardiac arrest.

Explanation

Deforestation is the permanent removal of forests, usually as a result of human activities like logging, agriculture, urbanization, and mining.

It leads to the loss of habitats, biodiversity, and ecosystem services, as well as contributing to climate change.

Explanation

Biogeography is the study of the distribution of living organisms across different regions of the world.

Including the factors that influence their distribution.

Such as geography, climate, geology, and evolutionary history.

Explanation

The speed of sound in air is affected by two main factors:

1. Temperature: As temperature increases, the speed of sound increases. This is because warmer air is less dense, allowing sound waves to travel faster.
2. Humidity: As humidity increases, the speed of sound decreases slightly. This is because water vapor in the air adds mass to the air molecules, making them slightly heavier and slower.

Explanation

Alkenes are a class of unsaturated hydrocarbons that contain one or more carbon-carbon double bonds (C=C).

This double bond is the defining feature of alkenes.

It makes them more reactive than saturated hydrocarbons (alkanes).

Explanation

Farmers were the earliest biotechnologists, as they inadvertently manipulated the genetic makeup of crops and livestock through selective breeding and domestication.

This traditional form of biotechnology dates back thousands of years, long before the discovery of DNA and modern genetic engineering techniques.

Explanation

Genotype refers to the genetic constitution of an individual, which is the specific set of genes and alleles that an individual possesses.

It is the genetic makeup of an individual that determines their traits and characteristics.

Explanation

Chromatin is the chemical material that makes up chromosomes, consisting of DNA, histone proteins, and other non-histone proteins.

It's the complex of DNA and proteins that form the chromosome.