Answer:
Cytosine & Guanine
Explanation:
Living organisms contain in their cell a biomolecule responsible for the storage and transmission of genetic information called NUCLEIC ACID. DNA is one of the two nucleic acids found in living cells. However, the DNA molecule is a polymer made up of monomeric units called NUCLEOTIDES.
Nucleotides of a DNA are made up of three components namely: 5-carbon sugar (deoxyribose), phosphate group, and a nitrogenous base (Adenine, Guanine, Cytosine and Thymine). Hence, based on the question, Cytosine & Guanine are the components (nitrogenous base) found in the DNA of all living organism.
Ventilation is the process which the air moves in and out of the lungs. Diffusion is the movement of gases without the use of energy and or effort by the body. Hope this helps!:)
The answer is A, in damp soil or rotting material
By definition it is one that serves as a model or example
Answer:
The correct answer is 4.6 percent.
Explanation:
The Oort cloud refers to the clouds of icy objects, which is present in the outermost section of the solar system. These are the disperse layer of clouds found in the external layer of the solar system.
In the given question, it is given that the number of comets in the Oort cloud is 10^12 comets.
The number of comets getting close towards the Sun is 10 comets in a year.
The age of the solar system is 4.6 * 10^9 years
The number of comets used since the start of the solar system is,
(4.6 * 10^9 years) (10 comets/year)
= 46 * 10^9 comets
Thus, the number of comets disappeared since the beginning of the solar system is 46 * 10^9 comets.
The initial number of comets at the start of the solar system is 10^12 comets.
The percentage of comets that are used up are:
(change in no of comets) / (initial no of comets) % = (46 * 10^9 comets) / (10^12 comets) * 100
= 4.6 percent.
