Answer: d. None of the above
Sustainable development involves the maintenance of human community with the adequate and judicious use of natural resources so that these resources will be available for future use. Small societies can maintain stability in the long terms by following notion of sustainable development. Smaller societies have a smaller demand for resources. As, lesser the number of individuals lesser will be the demand for resources and these resources will be available for future hence, smaller societies will maintain stability. Smaller societies can be governed by internal controls more effectively than larger societies because members can control the use of resources by creating awareness among themselves and use of resources can be checked upon. Small societies rely more heavily on legislation and military forces because these can ensure that all norms of resource conservation and sustainable development are strictly followed by members of the society.
Therefore, all options are useful for maintaining stability in the society.
Answer:
1.DNA is the carrier of genetic information in living organisms as the main constituent of chromosomes.
it is important for the development and genetic instruction guide for life and its processes.
2.molecules of phosphate and inorganic salts
Answer:
The correct answer is
(b)-Chromosomes are made up of protein and nucleic acid.
(c)-Genes are located on chromosomes.
(d)Chromosomes are found in the nucleus.
Explanation:
DNA coils around a protein molecule present inside the nucleus to form a compact structure called chromosomes. These histone proteins have a positive charge and it neutralizes the negative charge of the DNA.
By 1940 it was known by scientists that chromosomes are made up of protein and nucleic acids and chromosome carries the genetic material but at that time it was thought that protein part of the chromosome is the genetic material.
Then Hershey and Chase experiment in 1952 proved that DNA is the genetic material. Mendel first discovered that traits pass from one generation to another as separate factors. Later the word factor converted into gene in 1909 by Wilhelm Johannsen.
So by 1950, it was known that Chromosomes are made up of protein and nucleic acid, Genes are located on chromosomes, and Chromosomes are found in the nucleus.
Answer:
Add some iodine to a beaker containing the sample. If starch is present, the colour of the solution will turn blue-black.
Explanation:
Answer:
Proteins
Explanation:
Since proteins were made up of 20 different types of amino acids and DNA was only four A,G,C and T many scientists thought that these were most likely to be carrying information. In addition to amino acids being in so many varieties they were also of different charges and shapes as well. It was believed that the amount of information that can be held in these 20 amino acids are much greater than that that can be held in just four bases.