Smartindia Classroom
CONTENTS
English
Physics
Chemistry
Biology
Mathematics
Back to home
Start Practice
Question-1
Stomata of a plant opens due to
(A)
Influx of calcium ions
(B)
Influx of hydrogen ions
(C)
Influx of potassium ions
(D)
Efflux of potassium ions
Question-2
Potometer measures
(A)
Guttation
(B)
Plant growth
(C)
Transpiration
(D)
Root pressure
Question-3
The internal factor of transpiration is
(A)
Oxygen
(B)
Nitrogen
(C)
Carbondioxide
(D)
Sunken stomata
Question-4
The potassium ion (K+) exchange theory to explain the opening and closing of stomata was proposed by
(A)
Mansers
(B)
Levitt
(C)
Stewards
(D)
Sayer
Question-5
The ultimate cause for the movement of water against gravity in a tree is
(A)
Osmosis
(B)
Imbibition
(C)
Transpiration
(D)
Photosynthesis
Question-6
The shade of a tree is cooler than the shade of a roof, due to
(A)
Guttation
(B)
Green leaves
(C)
Transpiration
(D)
Photosynthesis
Question-7
Stomata of CAM plants
(A)
Never open
(B)
Are always open
(C)
Open at night and close during day
(D)
Open during day and close at night.
Question-8
The selective permeability identifies the process of
(A)
Diffusion
(B)
Osmosis
(C)
Plasmolysis
(D)
Imbibition
Question-9
The ability of the venus fly trap to trap the insects is due to
(A)
Specialized muscle like cells
(B)
Rapid turgor pressure changes
(C)
Chemical stimulation by the prey
(D)
A passive process requiring no special ability on the part of the plant
Question-10
'Transpiration is a necessary evil' was given by
(A)
Curtis
(B)
Steward
(C)
Anderson
(D)
J.C. Bose
Your Score 0/10
Click
here
to see your answersheet and detailed track records.
Plus 2 Biology Science
ICSE/ISC
Practice in Related Chapters
Cell Reproduction
DNA as a Genetic Material
Biomolecules of the Cell
Wild Life
Economic Zoology
Conservation of Natural Resources
Animal Reproduction and Development
Applications of Botany
Animal Tissues
Hormonal Coordination
Excretion and Osmoregulation
Genetics
Nervous Coordination
Morphology and Anatomy of Flowering plants
Orgin of Life Evolution and its maintenance
Circulation of Body Fluids
Water Relations
Plant Growth and Movements
Gas Exchange and Transport
Plant Growth,Growth Regulators,Photo - Morphogenesis and Plant Movements
Absorption and Movement of water in Plants
Nervous System
Cell Structure and and Function
Metabolism
Human Nutrition
Reproduction and Development in Angiosperms
Plant Nutrition
Human Respiration
Circulation in Humans
Applications of Biology
Breathing and Exchange of Gases
Powered By
