21.
Bending of a shoot towards light is
A
Irritability
B
Healing
C
Regeneration
D
A photochemical reaction
Answer :
Irritability
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22.
Which one of the following aspects is an exclusive characteristic of living things?
A
Isolated metabolic reactions occur in vitro
B
Increase in mass from inside only
C
Perception of events happening in the environment and their memory
D
Increase in mass by accumulation of material both on surface as well as internally
Answer :
Perception of events happening in the environment and their memory
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All living things have an ability to respond to their environment, which is also called stimulation.
23.
In Fern, gametophyte is
A
Main plant body
B
Prothallus attached to the sporophyte
C
Prothallus free from sprophyte
D
A structure attached to the rhizome
Answer :
Prothallus free from sprophyte
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24.
Plant nomenclature means
A
To give names to plants without any rules
B
Noemnclature of plants under the internations rules
C
Nomenclature of plants in local language
D
Nomenclature of plants in English language
Answer :
Noemnclature of plants under the internations rules
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25.
Long term adaptation helps in
A
Evolution
B
Survival
C
A and B both
D
None of the above
Answer :
Evolution
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26.
Phlogenetic system of classification was proposed by
A
Linneaus
B
Bentham
C
Hutchinson
D
Theophrastes
Answer :
Hutchinson
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27.
Poypetalaem Gamopetale and monochlamdae are subclasses of
A
Dicotyledonae
B
Gymnospermae
C
Monochlamydae
D
Siphanogama
Answer :
Dicotyledonae
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28.
Nostoc is known to perform
A
Only photosynthesis
B
Photosynthesis and nitrogen fixation simultaneously
C
Only nitrogen fixation
D
Either photosynthesis or nitrogen fixation at a time
Answer :
Either photosynthesis or nitrogen fixation at a time
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29.
The biological concept of species is mainly based on
A
Morphological features
B
Morphology and method of reproduction
C
Method of reproduction only
D
Reproductive isolation
Answer :
Reproductive isolation
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30.
The physical sufferings are often caused by bad deeds in the previous birth. It may be called
A
Serenidipty
B
Teleology
C
Control experiment
D
Hypothesis
Answer :
Teleology
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