241.
Which of the following taxonomists first employed the characteristics of vascular tissue in taxonomy A
Tippo
B
Engler and Prantl
C
Takhatajan
D
A.P. de Candolle
Answer :
A.P. de Candolle
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242.
Reason of diversity in living being A
Mutation
B
Long term evolutionary change
C
Gradual change
D
Short term evolutionary change
Answer :
Long term evolutionary change
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243.
A.P. De-Candolle classified plant on the basis of A
Vascular tissue
B
Embryo
C
Stem
D
Flower
Answer :
Vascular tissue
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244.
The smallest unit of classification is A
Family
B
Order
C
Genus
D
Species
Answer :
Species
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245.
Which of the following is connecting link between reptiles and birds A
Archaeopterix
B
Euglena
C
Neopiline
D
Latimeria
Answer :
Archaeopterix
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246.
Which one pair of examples will correctly represent the grouping Spermatophyta according to one of the schemes of classifying plants A
Acacia, Sugarcane
B
Pinus, Cycas
C
Rhizopus, Triticum
D
Ginkgo, Pisum
Answer :
Ginkgo, Pisum
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247.
The most thoroughly studied of the known bacteria-plant interactions is the A
Plant growth stimulation by phosphate - solubilising bacteria
B
Cyanbacterial symbiosis with some aquatic ferns
C
Gall formation on certain Angiosperms by Agrobacterium
D
Nodulation of Sesbania stems by nitrogen fixing bacteria
Answer :
Gall formation on certain Angiosperms by Agrobacterium
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248.
Homeostasis is organism's A
tendency to change with change in environment
B
tendency to resist change
C
disturbance in regulatory control
D
plants and animal extracts used in homeopathy
Answer :
tendency to resist change
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Homoeostasis is the property of all living beings, which is a self regulatory mechanism of maintaining favourable internal condition for uninterrupted chemical reactions in the living system despite the changes in the external environment. E.g., in winter the skin contracts to conserve body heat.
249.
Static concept of species was put forward by A
de Candolle
B
Linnaeus
C
Theophrastus
D
Darwin
Answer :
Linnaeus
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Carolus Linnaeus introduced Binomial System of Nomenclature in his book Species
Plantarum (1753). He said that there can be variation within species, but they do not change from one species to another.
250.
In the many bacteria, the cell membrane becomes ingavinated and folded to form A
Pili
B
Cristae
C
Fimbriae
D
Mesosomes
Answer :
Mesosomes
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