231.
Stomata can can open at night also in
A
Xerophyte
B
Gametophyte
C
Hydrophte
D
None of the above
Answer :
Xerophyte
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232.
Climacteric fruit shows
A
High respiration rate at ripening
B
Sudden change in taste
C
Sudden change in colour and shape
D
None of the above
Answer :
High respiration rate at ripening
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233.
Transport of water and salt is mediated by
A
Xylem
B
Sieve tubes
C
Sclerenchyma
D
Phloem
Answer :
Xylem
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234.
Due to increasing temperature , transpiration
A
Increases
B
Decreases
C
First increases then decreases
D
Unaffected
Answer :
First increases then decreases
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235.
In terrestrial habitats, temperature and rainfall conditions are influenced by
A
water transformations
B
transpiration
C
thermoperiodism
D
translocation
Answer :
transpiration
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236.
Photoperiodism affects
A
Vegetative growth
B
Internode elongation
C
Seed germination
D
Reproductive growth
Answer :
Reproductive growth
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237.
Which of the following criteria does not pertain to facilitated transport?
A
High selectivity
B
Transport saturation
C
Uphill transport
D
Requirement of special membrane proteins
Answer :
Uphill transport
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238.
The accurate relationship between SP,OP,TP can be expressed as
A
SP=OP+TP
B
OP=SP-TP
C
TP=SP-OP
D
SP=OP-TP
Answer :
SP=OP-TP
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239.
Which of the following apparatus is commonly used to measure the rate of transpiration is
A
Porometer
B
Altimleter
C
Potometer
D
Luxmeter
Answer :
Potometer
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240.
Who discovered the rood pressure
A
Stephen hales
B
Priestley
C
Dixon
D
Renner
Answer :
Stephen hales
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