Urea is a waste product formed from the breakdown of proteins and is excreted in urine.

Abiotic factors are the non-living physical and chemical components of an ecosystem, such as temperature.

Dimethyl ether is an ether, characterized by the presence of an oxygen atom connected to two alkyl or aryl groups.

Plants are a biotic factor as they are living organisms that interact with other organisms in the ecosystem.

Fungi are decomposers that break down dead organic matter, returning nutrients to the soil.

Density-dependent factors, such as disease, have a greater effect as the population density increases.

A dihybrid cross involves two traits, and AaBb x AaBb is an example of such a cross.

Golden rice is a genetically modified organism enriched with vitamin A to combat malnutrition.

Bt corn is genetically modified to express a bacterial protein that provides resistance to certain pests.

Elephants are considered a keystone species because they play a critical role in maintaining the structure of their ecosystem.

A sound wave is an example of a longitudinal wave, where the particle displacement is parallel to the direction of wave propagation.

Iron (Fe) is an example of a metallic solid, characterized by its metallic bonding and properties.

Iodine (I2) is an example of a molecular solid, where molecules are held together by van der Waals forces.

Bees pollinating flowers is a mutualistic relationship where both species benefit from the interaction.

Stevia is a natural sweetener derived from the leaves of the Stevia rebaudiana plant, making it a healthier alternative to synthetic sweeteners.

Natural gas is a non-renewable energy source as it is derived from fossil fuels that cannot be replenished in a short time.

FeO is an example of a non-stoichiometric solid because it can have varying ratios of iron and oxygen.

A rabbit is an example of a primary consumer as it feeds on plants (producers).

Butane is a saturated hydrocarbon, meaning it contains only single bonds between carbon atoms.

Mass is a scalar quantity as it has magnitude but no direction.

Color blindness is a sex-linked trait, primarily located on the X chromosome, affecting males more frequently than females.

An eagle is an example of a tertiary consumer as it feeds on secondary consumers like foxes.

Light waves are electromagnetic waves and are an example of transverse waves, where the oscillations are perpendicular to the direction of wave travel.

The human appendix is considered a vestigial structure, as it has lost its original function over the course of evolution.

Adaptive radiation refers to the rapid evolution of diversely adapted species from a common ancestor, exemplified by the finches in the Galapagos Islands.

Dissolving ammonium nitrate in water absorbs heat, making it an endothermic process.

Rubber is an example of an insulator.

The cane toad is an example of an invasive species that disrupts local ecosystems.

In the reaction C + O2 → CO2, carbon is oxidized as it loses electrons to form CO2.

Dog breeding is an example of artificial selection, where humans selectively breed animals for desired traits.