Q. No.Match the Scientists in Column I with their contribution in the field of virology given in Column II and select your answer from the codes given below:
Column I
Column II
A.
Ivanowsky
a.
Recognized tobacco mosaic is caused by microbes smaller than bacteria
B.
Beijerinck
b.
Demonstrated extract of infected tobacco plants could cause infection in healthy plants
C.
Stanley
c.
Showed that viruses could be crystallized
Codes:
A
B
C
1.
a
b
c
2.
a
c
b
3.
b
a
c
4.
b
a
d
Column I
Column II
A.
Ivanowsky
a.
Recognized tobacco mosaic is caused by microbes smaller than bacteria
B.
Beijerinck
b.
Demonstrated extract of infected tobacco plants could cause infection in healthy plants
C.
Stanley
c.
Showed that viruses could be crystallized
A
B
C
1.
a
b
c
2.
a
c
b
3.
b
a
c
4.
b
a
d
Cells in some filamentous cynobacteria that are speciallized for nitrogen fixation are called:
1. Phycobilisomes
2. Chromatophores
3. Grana
4. Heterocysts
1. The biological classification was attempted instinctively
a. to make scientific studies easy
b. to use organisms for our own use
c. to make better understanding of the research running in all over the world
d. to make connection between living and non-living
The first attempt for Biological classification was because of the need to use organisms for our own use. Here which kind of used are considered?
(1) Food and shelter
(2) Food and Hunting
(3) Food, shelter and clothing
(4) Except clothing all are correct
First time the scientific basis for classification was attempted by -
(1) Theopharastus
(2) Aristotle
(3) Van Neil
(4) Darwin
Which of the following statement is not incorrect with respect to biological classification attempted by Aristotle?
(1) Based on complex morphological characters
(2) Plants were classified into trees, shrubs and herbs
(3) Animals were classified on the basis of nutrition
(4) Phylogeny was also considered
The presence of RBC to classify animals was used as a unique criterion by
(1) Aristotle
(2) Theopharastus
(3) Van Neil
(4) Huxley
Which of the following statement is wrong with respect to two Kingdom classification?
(1) Developed at the time of Linnaeus
(2) Used till very recently
(3) Could distinguish between photosynthetic and non-photosynthetic
(4) Easy to do and easy to understand
Which of the following was not the limitation of two Kingdom classification?
(1) Could not distinguish between eukaryotes and prokaryotes
(2) Couldn't distinguish between unicellular and multicellular
(3) Large number of organisms remained unclassified
(4) Very difficult to classify and understand
Which of the following statement is not correct regarding biological classification?
(1) Gross morphology was not considered in two Kingdom classification
(2) Classification system has undergone many changes over the time
(3) Two Kingdoms are constant throughout just the concept of understanding them has been changed
(4) Nature of wall and method of reproduction was the two criteria which were also needed to consider after two kingdom classification.
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