22339 + Interview Questions in Biology in Class 11 Page 177 InterviewSolution

8801.	Question : Watermelon is a//an …………………plant.
Answer» BIENNIAL perennial geophytes EPHEMERAL Solution :ephemeral

Discussion

8802.	Question : Water will move from the root hair through cortex if the water potentials are
Answer» `{:("Root hair" ,"CORTEX","XYLEM"),(0,0,0):}` `{:("Root hair" ,"Cortex","Xylem"),(-2,-1,0):}` `{:("Root hair" ,"Cortex","Xylem"),(0,-1,-2):}` `{:("Root hair" ,"Cortex","Xylem"),(0,+1,+2):}` Solution :If a difference in water potential exists between the two regions spontaneous movement of water will take PLACE, provided the movement can occur between them, The DIRECTION of flow will be energeticallydown hill that is from the region of higher water potential (root hair) to the region of lower water potential (xylem) via cortex from less negative water potential `(e.g.,-1kPa)` OT more negative waterpotential `(e.g.,-2kPa)`

Discussion

8803.	Question : Water with dissolved minerals coming out through hydathodes is called
Answer» TRANSPIRATION evaporation transcription guttation Answer :D

Discussion

8804.	Question : Water vascular system is the characteristic of which group of the followings (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata
Answer» Solution :WATER VASCULAR system is a characteristic of the GROUP echinodermata.

Discussion

8805.	Question : Water vascular system is the characteristic of which groupof the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata.
Answer» SOLUTION :ECHINODERMATA

Discussion

8806.	Question : Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata
Answer» SOLUTION :(C) Water vascular system is a CHARACTERISTIC FEATURE of the phylum ECHINODERMATA.

Discussion

8807.	Question : water vascular system is the characteristic of which group of the following
Answer» Porifera ctenophora echinodermata Chordata Answer :C

Discussion

8808.	Question : Water vascular system is a characteristic of …………………. .
Answer» CTENOPHORE ANNELID echindermata ARTHOPODA SOLUTION :echindermata

Discussion

8809.	Question : Water vascular system in echinodermsserves for
Answer» LOCOMOTION RESPIRATION FOOD CAPTURE all of these ANSWER :D

Discussion

8810.	Question : Water stress causes the stomata ……. Hence ……… CO_(2) availability.
Answer» ANSWER :to CLOSE, REDUCES

Discussion

8811.	Question : Water transport from roots to leaves is explained by(a) the pressure flow theory(b) differences in source and sink solute concentrations(c) the pumping force of xylem vessels(d) the cohesion-tension theory
Answer» the pressure FLOW theory differences in SOURCE and sink solute concentrations the PUMPING FORCE of XYLEM vessels the cohesion-tension theory Answer :D

Discussion

8812.	Question : Water storage parenchyma is found in
Answer» HYDROPHYTES MESOPHYTES HALOPHYTES Succulents Answer :D

Discussion

8813.	Question : Water reaches the top of a plant due to
Answer» ROOT pressure capillarity transpiration diffusion

Discussion

8814.	Question : Water purification and water come under these ecosystem services respectively
Answer» SUPPORTING, PROVISIONING REGULATING, provisioning Provisioning, regulating Regulating, supporting Answer :B

Discussion

8815.	Question : Water potentialis generally most negative in
Answer» the SOIL solution mesophyll CELL walls xylem SAP of roots xylem sap of leaves Answer :B

Discussion

8816.	Question : Water potential of pure water at standard temperature is equal to
Answer» 10 20 0 None of these Answer :C

Discussion

8817.	Question : Water potential of a cell is lowered by the
Answer» ADDITION of SOLUTES addition of water increase in temperature decrease in temperature Answer :A

Discussion

8818.	Question : Water potential of a flaccid cell will be
Answer» `Psi_(w)=Psi_(s)` `Psi_(s)=Psi_(rho)` `Psi_(w)=0` Ψ w=Ψ s-Ψ p Solution :If plant cell happens to be bathed in hypertonic solution, it loses water through the process of EXOSMOSIS. The loss of wate is first from CYTOPLASM and then central vacuole. As a result, the protoplast is reduced in size. This decreases turgor pressure or pressure potential `(psi_(p))` and corresponding wall pressure. solute potentail becomes slightly more NEGATIVE DUE to loss of water. The cell ATTAINS a minimum size when turgor pressure is zero/pressure potential `(psi_(p))` is zero. Therefore, `psi_(w) = psi_(s) + psi_(p)` or `psi_(w) = psi_(s) (as psi_(p) = 0)` A cell which is deficient in turgor is called flaccid.

Discussion

8819.	Question : Water potential is the sum of two opposing forces in a plant and ………………………
Answer» SOLUTION :OSMOSIS, TURGOR

Discussion

8820.	Question : Water potentialis measured in ............... .
Answer» Watt Joule Calories Pascal Answer :A::C::D

Discussion

8821.	Question : Water potential is affected by:(a) osmotic potential(b) matric potential(c) pressure potential(d) all of these
Answer» OSMOTIC POTENTIAL MATRIC potential pressure potential all of these Answer :D

Discussion

8822.	Question : Waterpotential can be determined by solute potential and ......... .
Answer» MATRIC potential Pressure potential Osmotic potential Osmotic potential Answer :A::B

Discussion

8823.	Question : Differentiate between: Water potential and Diffusion pressure deficit.
Answer» SOLUTION :WATER POTENTIAL is the difference between the free energy of water molecules in pure water and solution, whereas diffusion PRESSURE DEFICIT (DPD) is the difference in diffusion pressure between a solution and pure solvent. Moreover, water potential has negative value, whereas diffusion pressure deficit has positive value.

Discussion

8824.	Question : Water passes into a cell due to
Answer» Op DPD turgor pressure diffusion. Solution :Cell GAIN or lose water among themselves on the BASIS of their water potential or DPD and not their solute or osmotic POTENTIALS only. Movement of water (SOLVENT) takes place from lower DPD to high DPD or from HIGHER water potential to lower water potential.

Discussion

8825.	Question : Water moves up against gravity and even for a tree of 20 m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is .....
Answer» SOLUTION :Absorbent force through transpiration is responsible for physiological process so water can go UPWARD till 20 metre. When water molecules transpire by stomata then it pushes water till LEAF in XYLEM as a continuous COLUMN of water, upwards. This transpiration water pressure gradient between substomatal cavity of leaf and intercellular spaces of leaf in the atmosphere. This gradient, later gets converted into photosynthetic cells and xylem of veins of leaf. As a result transpiration absorbent force is applied. That supplies water to height of 130m by xylem tissue.

Discussion

8826.	Question : Water moves up against gravity and even for a tree of 20mheight the tip receives water within two hours . The most important physiological phenomenon which is responsiblefor the upward movement of water is "______"
Answer» guttation evaporation transpiration none of these. Solution : According to transpiration pull theory due to transpiration the WATER column inside the plant comes under tension This is called transpiration pull On account of this tension, the water column is PULLED up PASSIVELY from below to top of the plant (almost LIKE a rope).A tension of one atmosphere is sufficient to pull water to a heigher of about `20` METERS.

Discussion

8827.	Question : Water moves from a cell with "____"DPD to a cell with "____"DPD.
Answer» HIGHER, lower lower,higher lower,lower higher,higher Solution :N//A

Discussion

8828.	Question : Water molecules move from a region of___________ water potential to a region of__________ water potential.
Answer» SOLUTION :HIGHER, LOWER

Discussion

8829.	Question : Water logging and soil salinity are the problems that have come in the wakeof
Answer» GREEN revolution white revolution blue revolution round revolution Answer :A

Discussion

8830.	Question : Water molecule is very polar. Polar end of molecule attracts opposite charges on another water molecule (acts like magnet). How will you explain this property of water with reference to upward movement of water ? Comment on the upward movement of water given the inter molecular hydrogen bonding in water.
Answer» SOLUTION :The polar SURFACE of WATER molecules SHOWS the property of contact (adhesive) force of water (of contact surface) more over the cohesive force (attractive force). Due to cohesive and adhesive property of water waterrises. In which (i) upper pulling force - resists pulling force. e.g. gravitational force (ii) higher capillarity - to rise in narrow tube. e.g. Tracheids and vessel elements Due to inter molecular hydrogen bond in water, the molecules of water possess more attractive force in liquid form (COMPARED to gases). Thus with reference to surface tension, water can rise upward in xylem.

Discussion

8831.	Question : Water is pulled upward through the xylem against gravity because of…………………. between water molecules and ……………………………. of water molecules to the hydrophilic walls of narrow xylem channels
Answer» SOLUTION :COHESION, ADHESION

Discussion

8832.	Question : Water is not required for the act of fertilization in
Answer» Mosses Ferns Grasses Liverworts Answer :C

Discussion

8833.	Question : Water is indispensable for life. What properties of water make it useful for all biological processes on the earth ?
Answer» Solution :Properties : (1) Water is a main solvent. Soluble salts dissolved in it and enters to plant through soil solution. (2) It is an ideal solvent and its pH is neutral. (3) It is the main COMPONENT of protoplasm. (4) Water is a medium for transport of nutrients salts are absorbed by water carbohydrate which is formed during photosynthesis, is transported through water from one cell to another cell, from TISSUE to tissue and organ to organ. (5) Water is necessary for photosynthesis. Hydrogen ion in formation of carbohydrate and molecule of oxygen in the flow of `O_2` are released from it. (6) Water plays role in regulation of temperature. The definite temperature of water is responsible to maintain internal temperature of plants. (7) In some plants water is useful for pollination. e.g. bryophytes and Pteridophytes. Water is NEEDED for fertilization in them.

Discussion

8834.	Question : Water is life for plants.
Answer» Solution :Water plays a lead role in all PHYSIOLOGICAL processes of water. Plants cannot LIVE LONGER WITHOUT water. Water plays an important role in composition of protoplasm. It has an effect on growth and PRODUCTIVITY of plants. Various hormones, enzymes, mineral salts, nutrients dissolve in water and transported to various parts of the plant.

Discussion

8835.	Question : Water is largely absorbed in…………. .
Answer» STOMACH OESOPHAGUS SMALL INTESTINE Colon Solution :N/A

Discussion

8836.	Question : Water is essential for the life cycle of Funaria because
Answer» it will DRY without WATER fertilisation takes place in water it is a HYDROPHYTE the growth will remain stunted in the absence of water

Discussion

8837.	Question : Water is essential for germination.
Answer» Solution :Water brings about the activation of the dormant protoplasm. The activation of CELL requires about `75-95%` of water for carrying out their metabolism. It is also ESSENTIAL for RESPIRATION as oxygen reaches the protoplasm only in a state of solution in water. Water softens the SEED coat and the testa seeds swell up and embryo BREAK through the softened seed coat and comes out easily.

Discussion

8838.	Question : Water is essential for bryophyta
Answer» For fertilization and homosporous nature Water should be filled in ARCHEGONIUM for fertilization Water is NECESSARY for MOVEMENT of sperm For DISSEMINATION spores Answer :C

Discussion

8839.	Question : Water is essential for fertilization ………
Answer» ANGIOSPERMS BRYOPHYTES Gymnosperms Fungi Answer :B

Discussion

8840.	Question : Water inside a Coconut is ________
Answer» LIQUID ENDOSPERM Liquid endocarp Liquid mesocarp Liquid nucleus Solution :Liquid endosperm

Discussion

8841.	Question : Water in the soil available to plants is :
Answer» GRAVITATIONAL WATER Capillary water Hygroscopic water None of these Answer :B

Discussion

8842.	Question : Water glands are also called
Answer» HYDATHODES PITCHERS BULLIFORM CELLS Laticiferous glands Answer :A

Discussion

8843.	Question : Water flows from where its potential is ……………………… to where its potential is .........
Answer» SOLUTION :HIGHER, LOWER

Discussion

8844.	Question : Water flows from the
Answer» more POSITIVE osmotic POTENTIAL to the more NEGATIVE water potential higher water potential to the lower water potential more positive water potential to the more negative water potential all of the above Answer :A

Discussion

8845.	Question : Water droplets are observed near the tip of grass blades in early morning. Why does this phenomenon occur?
Answer» SOLUTION :HIGH root pressure and low transpiration RATE

Discussion

8846.	Question : Water evaporation from plant parts is called :(a) translocation(b) transpiration(c) guttation(d) tension
Answer» TRANSLOCATION transpiration guttation tension Answer :B

Discussion

8847.	Question : Water enters into spongocoel through
Answer» osculum choanocytes ostia madreporite Answer :C

Discussion

8848.	Question : Water droplets are observed near the tip of grass blades in early morning. What is the loss of water in liquid phase called?
Answer» SOLUTION :GUTTATION.

Discussion

8849.	Question : Water currents in a sponge body are maintained by
Answer» ARCHAEOCYTES pinacocytes spongocytes choanocytes Answer :D

Discussion

8850.	Question :Water content of mature seeds is generally
Answer» 5-10 PER CENT MOISTURE by MASS 10-15 per cent moisture by mass 30-35 per cent moisture by mass 70-85 per cent moisture by mass Answer :2

Discussion

Explore topic-wise InterviewSolutions in .

Question : Watermelon is a//an …………………plant.

Question : Water will move from the root hair through cortex if the water potentials are

Question : Water with dissolved minerals coming out through hydathodes is called

Question : Water vascular system is the characteristic of which group of the followings (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata

Question : Water vascular system is the characteristic of which groupof the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata.

Question : Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata

Question : water vascular system is the characteristic of which group of the following

Question : Water vascular system is a characteristic of …………………. .

Question : Water vascular system in echinodermsserves for

Question : Water stress causes the stomata ……. Hence ……… CO_(2) availability.

Question : Water transport from roots to leaves is explained by(a) the pressure flow theory(b) differences in source and sink solute concentrations(c) the pumping force of xylem vessels(d) the cohesion-tension theory

Question : Water storage parenchyma is found in

Question : Water reaches the top of a plant due to

Question : Water purification and water come under these ecosystem services respectively

Question : Water potentialis generally most negative in

Question : Water potential of pure water at standard temperature is equal to

Question : Water potential of a cell is lowered by the

Question : Water potential of a flaccid cell will be

Question : Water potential is the sum of two opposing forces in a plant and ………………………

Question : Water potentialis measured in ............... .

Question : Water potential is affected by:(a) osmotic potential(b) matric potential(c) pressure potential(d) all of these

Question : Waterpotential can be determined by solute potential and ......... .

Question : Differentiate between: Water potential and Diffusion pressure deficit.

Question : Water passes into a cell due to

Question : Water moves up against gravity and even for a tree of 20 m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is .....

Question : Water moves up against gravity and even for a tree of 20mheight the tip receives water within two hours . The most important physiological phenomenon which is responsiblefor the upward movement of water is "______"

Question : Water moves from a cell with "____"DPD to a cell with "____"DPD.

Question : Water molecules move from a region of___________ water potential to a region of__________ water potential.

Question : Water logging and soil salinity are the problems that have come in the wakeof

Question : Water is pulled upward through the xylem against gravity because of…………………. between water molecules and ……………………………. of water molecules to the hydrophilic walls of narrow xylem channels

Question : Water is not required for the act of fertilization in

Question : Water is indispensable for life. What properties of water make it useful for all biological processes on the earth ?

Question : Water is life for plants.

Question : Water is largely absorbed in…………. .

Question : Water is essential for the life cycle of Funaria because

Question : Water is essential for germination.

Question : Water is essential for bryophyta

Question : Water is essential for fertilization ………

Question : Water inside a Coconut is ________

Question : Water in the soil available to plants is :

Question : Water glands are also called

Question : Water flows from where its potential is ……………………… to where its potential is .........

Question : Water flows from the

Question : Water droplets are observed near the tip of grass blades in early morning. Why does this phenomenon occur?

Question : Water evaporation from plant parts is called :(a) translocation(b) transpiration(c) guttation(d) tension

Question : Water enters into spongocoel through

Question : Water droplets are observed near the tip of grass blades in early morning. What is the loss of water in liquid phase called?

Question : Water currents in a sponge body are maintained by

Question :Water content of mature seeds is generally

Question : Water moves from a cell with ""DPD to a cell with ""DPD.

Question : Water molecules move from a region of_ water potential to a region of water potential.