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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
which of the following helps in ascent of sap	root pressure, transpiration anad capillarity
water potential of pure water and its solution are	0 and less than 1
a botanist discovered a mutant plant that was unable to produce materials that form casparian strip. this plant would be	unable to control amounts of water and solutes it absorbs
if a cell A with DPD 4 bars is connected to cell B,C,D whose O.P. an T.P. are respectively 4 and 4,10 and 5 and 7 and 3 bars, the flow of water will be	B to A, C and D
water vapour comes out from the plant leaf through the stomatal opening. through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis.	both processes can happen together because the diffusion coefficient of water and CO2 is different
which of the following criteria does not pertain to facilitated transport	uphill transport
if a cell A with DPD 4 bars is connected to cell B,C,D whose OP and TP are respectively 4 and 4, 10 and 5 and 7 and 3 bars , the flow of water will be	B to A, C and D
which one gives the most valid and recent explanantion for stomatal movements?	potassium influx and efflux
water potential of actively absorbing cells is	always -ve
water potential in the leaf tissue is positive during	guttation
a column of water within xylem vessels of tall trees does not break under its weight because of	tensile strength of water
root pressure develops due to	active absorption
roots play insignificant role in absorption of water in	pistia
the closure of lid of pitcher in a pitcher plant is due to	paratonic movement
water movement between cells is due to	D.P.D.
potometer works on the principle of	amount of water absorbed equals the amount transpired
which of the following plant is found to have minimum transiration	nerium
conversion of starch to organic acids is required for	stomatal opening
at constant temperature, the rate of transpiration will be higher at	1.5 km above sea level
in guard cells when sugar is convered into starch, the stomatal pore	closes completely
the translocation of organic solutes in seive tube members is supported by	P-protien
carbohydrates are commonly found as starch in plant storage organs. which properties of starch make it useful as a storage material	chemically non reactive and osmotically inactive