SCIENCE QUEASTION BANK WITH ANSWERS
Life processes
1 marks questions
1 How is Oxygen supply more efficient in birds and mammals?
The left and right sides of the heart are separate, so oxygenated and
deoxygenated blood do not mix
2 Write the function of platelets
Blood clots in injured areas and stops the leakage
3 What is the function of air sacs or alveoli in the lungs?
The exchange of carbon dioxide and oxygen gases between the blood and
the cells.
4 Write the function of Villi?
Villi increase the surface area needed to absorb digested food.
5 Name the two types of vascular tissue in plants ?
Xylem and Phloem
2 marks questions
1 Draw the diagram of open stomata and identify the parts ?
2 chapatis taste the sweeter than chewed slowly why?
, The saliva released while chewing chapati contains the enzyme amylase .
This enzyme breaks down the starch in chapati and converts it into simple
sugar
3 What is the function of bile juice?
Alkalizing food * Breaking down large fat particles into smaller particles to
increase the efficiency of enzymes
4 If human had a three changed heart like a frog then how would be the
blood circulation ?
The blood circulation was incomplete, as pure and impure blood was
mixed. *Double blood circulation was not observed
5 What is the role of hydrochloric acid in our stomach?
Creates an acidic environment to promote the action of the enzyme
pepsin. Destroys microorganisms that enter the stomach with food.
3 mark questions
1 Draw the diagram showing the section of human heart identify the parts
?
2 Explain the process of transport of new trains in plants ?
The translocation of food substances in plants takes place in the phloem
tissue. * The translocation of food and other substances takes place in
both upward and downward directions with the help of the lateral
companion cells of the phloem * This action is achieved by Osmotic
pressure.
3 How is water transported to the higher parts of the plant ?
Life processes
1 marks questions
1 How is Oxygen supply more efficient in birds and mammals?
The left and right sides of the heart are separate, so oxygenated and
deoxygenated blood do not mix
2 Write the function of platelets
Blood clots in injured areas and stops the leakage
3 What is the function of air sacs or alveoli in the lungs?
The exchange of carbon dioxide and oxygen gases between the blood and
the cells.
4 Write the function of Villi?
Villi increase the surface area needed to absorb digested food.
5 Name the two types of vascular tissue in plants ?
Xylem and Phloem
2 marks questions
1 Draw the diagram of open stomata and identify the parts ?
2 chapatis taste the sweeter than chewed slowly why?
, The saliva released while chewing chapati contains the enzyme amylase .
This enzyme breaks down the starch in chapati and converts it into simple
sugar
3 What is the function of bile juice?
Alkalizing food * Breaking down large fat particles into smaller particles to
increase the efficiency of enzymes
4 If human had a three changed heart like a frog then how would be the
blood circulation ?
The blood circulation was incomplete, as pure and impure blood was
mixed. *Double blood circulation was not observed
5 What is the role of hydrochloric acid in our stomach?
Creates an acidic environment to promote the action of the enzyme
pepsin. Destroys microorganisms that enter the stomach with food.
3 mark questions
1 Draw the diagram showing the section of human heart identify the parts
?
2 Explain the process of transport of new trains in plants ?
The translocation of food substances in plants takes place in the phloem
tissue. * The translocation of food and other substances takes place in
both upward and downward directions with the help of the lateral
companion cells of the phloem * This action is achieved by Osmotic
pressure.
3 How is water transported to the higher parts of the plant ?
