General Science Questions

DNA stands for Deoxyribo nucleic acid. It is a nucleic acid made up of monomeric unit called Nucleotide.

A nucleotide consist of -

a) Sugar - Deoxyribose in DNA ( ribose in RNA)

b) An organic base- Adenine, cytosine, guanine.

Secondhand smoke is very dangerous and creates serious health risks to you and your family members. 

Air pollutants are solid particles, gases, and liquid droplets in the air that can adversely affect ecosystems and the health of humans.

Major ambient air pollutants include toxic metals, polycyclic aromatic hydrocarbons, benzene, particulate matter (PM), nitrogen oxides, sulfur oxides, carbon monoxide, and ozone. Power plants, factories, and vehicle and air traffic are the most important anthropogenic sources of air pollution.

In addition, natural sources such as wildfires and volcanic activity contribute to ambient air pollution.

Lines are used in art to indicate

a. boundaries between forms.
b. direction and motion.
c. shadows and highlights.
d. spatial depth on flat surfaces.

Carbon monoxide is a common atmospheric pollutant in the world which is produced in combustion process in automobiles and industries. It has no smell and cannot be seen.

DNA fingerprinting is used to identify the parents, thieves and rapists.

Passive transport Process includes all other process like facilitated diffusion, osmosis and diffusion of a solute across a membrane.