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)
