Question

frie diology 10 TEST3 Choose ihe one ment correct answer for each question. Fill is the appropriate space on yoar nswer sheet. The age of the earth is estimated so be about I million years ol b. 4 million years old c I billion years old d. 2.5 billion years old () 46 billtion years old 2. Maller's laboratory experiments shownd tha a the first cell was probably made of nucleic acids h. it is possible to form prosocelils s the primitive gases can react together to prodace smail organic molecules d atmospherie pressure is required for life to begin 3. The organic soup in which the first cell is believed to have arisen probably contained L isolated atoms b. bubbling hot gases only alge and other microscopic organism d. amino acid and other organic acids s. Which of the following molecules is thought to have been absent trom the primitive stmonphere a. water vapor (HjO) b. carbon dioxide (Co,) c. hydrogen (Ha) d. oxygen (O) e. nitrogen (N2) L produce oxygen b, make their own food c. take in preformed food d are believed to originate after autotrophs Biological evolution differs from chemical evolution in that it (biological evolution) would have been possible only after the development of a. true cells b. nucleic acids C. enzymes 6. d. a metabolic pathway Bind and

Answer 1

Answer for the question number 1 : The correct option is E

Supplementary information : Oringin of earth dates back to 4.6 billion years or 4600 millions where as life originated 3.6 billion or 3600 million years back.

Answer for question number 2 : The correct answer is C

Explanation : Stanley millers experiment provided a convincing evidence to prove A I oparin and JBS Haldane's theory of chemical evolution. A.I Oparin and JBS Haldane in their book “Origin of life on Earth” to provide biochemical explanation of origin of life.

                They proposed that the condition of primitive earth was different from the present conditions. They opened that primitive earth was reducing in nature and consisting of water, methane and ammonia from which as result of series of changes a colloidal body called coacervates containing a mixture of biologically important macromolecules like lipids, amino acids were formed which though were no living but behaved similar to biological systems thus they opened that evolution was purely chemical the gradual transformation of inorganic compounds into organic ones.