physiology of plants, humans and animals - Category wise Question and Answer Practice Test with Solutions
physiology of plants, humans and animals PRACTICE TEST [6 - EXERCISES]
set 1
set 2
set 3
set 4
set 5
set 6
Question : 22
Which one of the following correctly represents the normal adult human dental formula ?
a) $2/2, 1/1, 3/2, 3/3$
b) $3/3, 1/1, 3/2, 1/1$
c) $2/2, 1/1, 2/2, 3/3$
d) $3/3, 1/1, 3/3, 3/3$
Answer »Answer: (c)
The adult dental formula of human is Incisor $2/2$, Canine $1/1$, Premolar $2/2$, Molar $3/3$.
Question : 25
Stomata open and close due to
a) genetic clock
b) pressure of gases inside the leaves
c) circadian rhythm
d) turgor pressure of guard cells
Answer »Answer: (d)
Turgor pressure is the pressure that develops in a cell due to the osmotic diffusion of water inside it and is responsible for pushing the membrane against the cell wall.
Stomata open under conditions of increased turgor pressure of guard cells and stomata get closed under conditions of decreased turgor pressure of guard cells.
When turgid, they swell and bend outward. As a result, the stomatal aperture opens. When they are flaccid, the tension from the wall is released and the stomatal aperture closes.
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set 2 Online Quiz
Click to Start..general science mcq CATEGORIES
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» Measurement And SI Units
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» Measuring Devices And Scales
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» Mechanics (Mass, Force, Acceleration, Work, Energy, Momentum, Velocity)
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» Force Of Gravity, Solids And Fluids
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» Motion Under Gravity
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» Physical Properties Of Materials
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» Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations
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» Electric Current And Magnetism
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» Nuclear Physics And Conductivity
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» Modern And Space Physics, Sources Of Energy
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» General Concepts Of Chemistry
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» Nature Of Matter And Composition
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» Atomic Structure Molecules And Nuclear Chemistry
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» Classification Of Elements, Chemical Bonding, Periodicity In Properties & Physical Transformation
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» Metals, Non Metals, Minerals, Ores, Properties, Uses
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» Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases
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» Acids, Bases, Salts And Metals
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» Hydrocarbon, Alcohol, Polymer, Organic Acid And Explosive Substance
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» Fuel, Food Preservation, Nutrition, Medicine, Detergents And Fertilizers
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» Inorganic Chemistry
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» Organic Chemistry
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» Environmental Chemistry
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» Some Important Man Made Materials
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» Sub Divisions Of Biology
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» Genetics, Evolution Of Life & Ecological Biodiversity
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» Taxonomy
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» Heredity
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» Biofertilizer
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» Biological Classification Cell Tissues And Division
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» Human Anatomy
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» Blood Transport System
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» Digestion And Excretion
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» Photosynthesis
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» Vitamins, Nutrition, Health, Disease And Treatment
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» Endocrine Glands, Hormones
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» Physiology Of Plants, Humans And Animals
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» Reproduction
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» Genetic Engineering And Bio Technology
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