Friday, March 8, 2019

Evolution: Previous Year Questions Part 1

EVOLUTION

2010 MARCH
1.     Arrange the following in hierarchical manner based on the period of their evolution.                                      (2)
Homo erectus, Rama pithecus, Australo pithecus, Homo sapiens, Neanderthal man
2.     Fill the columns A & B using the words given below. (2)

A
B
Development of DDT resistant ants




Adaptive radiation


Genetic drift
Inheritance of acquired characters


(Lamarckism, Evolution by anthropogenic action, Gene flow by chance, Varieties of marsupials in Australia, de Vries)
2010 SAY
1.     The diagram shown below represents the operation of natural selection on different traits. Observe the diagrams and answer the following.

a. The graph C shows a marked difference from graph A. why? (1)
b. What is the evolutionary significance of directional selection? (1)
c. Mention the factors affecting gene frequency. (1)
d. What is meant by founder effect? (1)

2011 MARCH
1.     a) Arrange the given chemical compounds in the sequential order as per the concept of origin of life.
(Ammonia, Hydrogen, Protein, Nucleic acid, Amino acid)              (1)
b) Correlate Miller’s experiment with this.                (1)
2.     A bacterial infection was effectively controlled by using a specific antibiotic for a long time. But now- a- days this antibiotic is not found to be so effective to control the said infection. Give a scientific explanation for this phenomenon based on evolution.         (2)
2011 SAY
1.    From the following details, prepare a flow chart showing evolution of modern man.                                      (2)
Dryopithecus, Australopithecus, Homo erectus, Homo habilis, Rama pithecus, Homo sapiens, Neanderthalensis
2012 MARCH
1.     Note the relationship between the first pair and complete the second pair.
a.   Natural selection: Darwin  
Inheritance of acquired characters: ……………… (½)
b.   Heart of vertebrates: Homologous organs
Flippers of Penguin and Dolphin: …………………..  (½)
2.     A collection of peppered moths made in England during different period is given below.

Types of moths
Years
1850
1920
1980
White winged moth
1200
305
1150
Dark winged moth
315
1100
302
a.     What is your observation?         (½ Score)
b.     Name the evolutionary process behind this phenomenon.                  (½ Score)
c.     Write the reason for decreased number of white winged moth in 1920.                            (½ Score)
3.     An evolutionary process occurred in the evolution of marsupial mammals in Australia is given below.
a.     Name this evolutionary process. (½  Score)
b.     Suggest another example for this phenomenon.                                                                                   (1 Score)
2012 SAY
1.     Diagrammatic representation of the operation of natural selection in a population is given.
Redraw the diagram when nature selects large sized and small sized individuals.                                        (1)
2.     Complete the flowchart showing evolution of man using age, name and brain capacities of fossil.             (2)

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