Carbon.
carbon
H20
Water would be the most abundant substance but if you're asking about elements then oxygen would make up the greatest percentage of body mass.
Water is the single most abundant compound in living things.
Water is the most abundant compound in living organisms.
Water
Living in the Material World
Yes, the genetic material in living organisms can be double stranded, as seen in DNA, or single stranded, as seen in RNA.
Single most (what?) substance ---common? ---important? ---fragile? This question is not formed properly and thus can not be answered
Both viruses and living single-celled organisms contain genetic material (DNA or RNA) that carries the instructions for their biological functions. This genetic material controls the reproduction and activities of the organism or virus.
Water is the single most abundant chemical substance in the body, making up about 60% of an adult's total body weight.
A single bed of sedimentary rock that consists of one type of material is known as a monomineralic bed. This type of bed forms when sediments are predominantly composed of a single mineral, such as quartz or calcite, and accumulate in a continuous layer. Monomineralic beds are common in environments where one type of mineral is abundant and dominant in the sedimentation process.