The answer is A. DNA is the genetic code that eventually gets transcribed into RNA and that RNA is then translated into protein chains (polypeptides). Thus the ultimate purpose of DNA is to build these proteins.
B is wrong because while DNA itself exists in a double helix, its main function is not to build other double helix models. In fact, RNA exists in single helix form.
C is wrong because the brain does not construct the body.
D is wrong because DNA is just a body of information, and not a historical record.
Answer:
Sustainable development refers to development that meets the needs of the present generation without compromising the needs of the future generations.
Explanation:
This definition of sustainable development was first introduced after the Brundtland Commission Report. It explains that humans social, economic, and environmental activities should be done in balance. Also, the Report further noted the driving force behind humans activities is "needs"; and as such this "needs" should be kept in balance.
Answer:
Sediments are used to provide the proxies to understand the environmental changes as, the sediments are formed by the activity of the weathering from the wind, glacier and the water. The different weathering agent and other transportation agent are different types of the mark over the sediments that help in the study of the past environment.