CBSE Class 7 Science Transportation in Animals and Plants MCQs Set 02

Question: The transpiration in plants will be lowest
a) When there is high humidity in the atmosphere
b) There is excess of water in the cell
c) Environmental conditions are very dry
d) High wind velocity
Answer: a

Question: The process by which a plant loses water through the stomata is called –
a) Excretion
b) Transpiration
c) Respiration
d) Sweating
Answer: b

Question: Which of the following processes keeps plant cool?
a) Transpiration
b) Guttation
c) Photosynthesis
d) Translocation
Answer: a

Question: Which one of the following is connected with transport of water in plants?
a) Phloem
b) Xylem
c) Epidermis
d) Cambium
Answer: b

Question: The opening of urinary bladder is known as –
a) Nephron
b) Urethra
c) Ureter
d) Nephridia
Answer: b

Question: Water will be absorbed by root hairs when
a) Concentration of solutes in the cell sap is high
b) Plant is rapidly respiring
c) They are separated from soil by a permeable membrane
d) Concentration of salts in the soil is high
Answer: a

Question: Bean shaped excretory organ of human is –
a) Kidney
b) Urethra
c) Ureter
d) Urinary bladder
Answer: a

Question: Urea is a waste produced in the process of the breaking down of –
a) Protein
b) Fats
c) Carbohydrate
d) Sugar
Answer: a

Question: The smallest functional unit of kidney is –
a) Nephron
b) Capillary
c) Urethra
d) Ureter
Answer: a

Question: It transports the water & minerals from root to leaves in plants –
a) Xylem
b) Cambium
c) Phloem
d) Stomata
Answer: a

Question: The process of the escape of liquid from the tip of uninjured leaf or through hydathodes is called
a) Transpiration
b) Guttation
c) Evapo-transpiration
d) Evaporation
Answer: b

Question: Both erythrocytes and leucocytes are formed in the –
a) Bone marrow
b) Thymus
c) Arterial walls
d) Lymph nodes
Answer: a

Question: Rate of transpiration in a dorsi ventral leaf is
a) Greater at the upper surface
b) Greater at the lower surface
c) Equal at both the surfaces
d) None of the above
Answer: b

Question: Blood from the lungs enters the heart through the –
a) Pulmonary artery
b) Aorta
c) Pulmonary vein
d) Venacava
Answer: c

Question: The cause of wilting of plant is –
a) More absorption
b) More transpiration
c) Low respiration
d) None
Answer: b

Question: Pumping station of blood is –
a) Heart
b) Auricle
c) Blood vessel
d) Ventricle
Answer: a

Question: Which one of the following is the most common type of transpiration?
a) Stomatal
b) Lenticular
c) Foliar
d) Cuticular
Answer: a

Question: Which component of blood helps in clotting?
a) RBC
b) WBC
c) Platelets
d) Plasma
Answer: c

Question: Pressure exerted in the tracheary elements of a xylem as a result of metabolic activity of roots which forces the water into xylem vessel and upwards into the stem for a certain height is
a) Osmotic pressure
b) Root pressure
c) Atmospheric pressure
d) Turgor pressure
Answer: b

Question: In plants excess amount of carbon dioxide escapes through the –
a) Stomata
b) Phloem
c) Xylem
d) Cambium
Answer: a 

Question: The smallest blood vessel in the body is
a) capillary
b) artery
c) vena cava
d) vein
Answer: a

Question: The universal donor has ………………… blood group
a) A
b) B
c) AB
d) O
Answer: d

Question: The advantage of RBC’s being biconcave is that
a) to increase surface area
b) they can be packed up like coins
c) they can fit into capillaries
d) none of the above
Answer: a

Question: Which of the following has no muscular walls?
a) Artery
b) Arteriole
c) Capillary
d) Vein
Answer: c

Question: Blood cells that help to stop bleeding in human beings are
a) red blood cells
b) white blood cells
c) blood platelets
d) haemoglobin
Answer: c

Question: In the heart of man the bicuspid valve is situated between
a) right ventricle and pulmonary aorta
b) left auricle and left ventricle
c) right auricle and right ventricle
d) postcaval and auricle
Answer: b

Question: The tricuspid valve occurs between the
a) right auricle and right ventricle
b) pulmonary aorta
c) cortico-systemic aorta and left ventricle
d) left ventricle
Answer: a

Question: The exchange of materials between blood and interstitial fluid occurs only at the
a) veins
b) capillaries
c) arteries
d) arterioles
Answer: b

Question: Which one of the following is called pacemaker of the heart?
a) SA node
b) AV node
c) Chordae tendinae
d) AV septum
Answer: a

Question: About how much blood is in the circulatory system of an average person?
a) 1 litre
b) 2 litres
c) 5 litres
d) 10 litres
Answer: c

Question: The cells constituting walls of the blood capillaries are known as
a) parietal cells
b) haemocytes
c) oxyntic cells
d) endothelial cells
Answer: d

Question: Pulse beat is measured from
a) artery
b) nerve
c) capillary
d) vein
Answer: a

Question: Which blood constituent makes up more of the volume of blood?
a) Red blood cells
b) Plasma
c) Blood proteins
d) White blood cells
Answer: b

Question: Indicate correct statement for man?
a) Arteries always carry oxygenated blood while veins always carry deoxygenated blood
b) Arteries are provided with valves while veins are devoid of valves
c) Arteries always carry blood away from the heart, while veins always carry blood towards the heart
d) Venous blood is returned to left auricle
Answer: c

Question: Systole causes
a) entry of blood into lungs
b) entry of blood into heart
c) exit of blood from heart
d) exit of blood from ventricles
Answer: d

Question: Iron in haemoglobin exists as
a) unionised iron atom
b) ferric ions only
c) ferrous ions only
d) ferric or ferrous ions depending upon the oxygenated state
Answer: c