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CBSE - Class 10 Science Life Processes Worksheet
Which component of blood Helps in blood clotting
WBC
b.RBC
c.Platelet
d.Hemoglobin
The enzyme present in saliva is
Pepsin
b.Trypsin
c.Amylase
d.Lipase
Translocation of food is always
Upward
b.Downward
c.Bidirectional
d.Random
Which structure prevents the mixing of oxygenated and deoxygenated blood in humans
Valves
b.Septum
c.Atrium
d.Ventricles
Blood pressure suddenly drops below normal. Which organ will be affected first?
Kidneys
b.Stomach
c.Small intestine
d.Lungs
A student places, a potted plant in a dark room for 48 hours. What will happen?
Starch increases
b.CO2 production shops
c.Photosynthesis stops completely
d.Transpiration becomes faster
Which gas is taken in and which is given out during the process of aerobic respiration?
O? taken in, CO? given out
b.CO? taken in, O? given out
c.O? taken in, N? given out
d.CO? taken in, N? given out
In which part of the alimentary Canal Is no digestion occurring
Mouth
b.Stomach
c.Esophagus
d.Small intestine
Assertion (A): Stomata close when guard cells lose water.
Reason (R): Guard cells become flaccid due to loss of turgor pressure.
Both A and R are true, and R is the correct explanation of A.
b.Both A and R are true, but R is NOT the correct explanation of A.
c.A is true but R is false.
d.A is false but R is true.
The movement of water in xylem is due to
Translocation
b.Transpiration pull
c.Diffusion
d.Osmosis
Veins have valves to prevent backflow because
They carry deoxygenated blood
b.They are deep seated
c.Blood flow is against gravity and low pressure
d.They are thin walled
Which part of the nephron is responsible for filtration of blood?
Tubules
b.Collecting duct
c.Glomerulus
d.Bowman's capsules
The phloem transport of food is mainly driven by
Passive diffusion
b.Active transport and Pressure gradient
c.Gravity
d.Transpiration pull
The opening and closing of stomata in leaves is mainly regulated by:
Guard cells
b.Xylem vessels
c.Phloem tubes
d.Root hairs
In which mode of nutrition an organism derives its food from the body of another living organism without killing it?
Saprotrophic nutrition
b.Parasitic nutrition
c.Holozoic nutrition
d.Autotrophic nutrition
Which of the following are energy foods?
Carbohydrates and fat
b.Vitamins and minerals
c.Proteins and mineral salts
d.Water and roughage
Which part of nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
Tubule
b.Glomerulus
c.Bowman’s capsule
d.Ureter
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