Class 7 Science MCQ Transportation in Animals and Plants

Question : Veins allow blood to flow only

(a) Towards the heart
(b) Away from the heart
(c) Towards lungs
(d) Away from the lungs

Question : The heart is located in the

(a) Chest cavity
(b) kidney cavity
(c) Brain cavity
(d) muscle cavity

Question : The cells helping in clotting of blood are:

(a) white blood cells
(b) red blood cells
(c) blood platelets
(d) none of these

Question : The main excretory product in human beings is:

(a) uric acid
(b) ammonia
(c) urea
(d) water

Question : The droppings of birds are:

(a) black
(b) white
(c) green
(d) white and deep green

Question : The Organism that does not have circulatory system

(a) Dog
(b) Frog
(c) Human
(d) Hydra

Question : The blood vessels which carry oxygen –rich blood from the heart to all parts of the body are called __________________________.

(a) Arteries
(b) Veins
(c) RBC
(d) WBC

Question : The Arteries have thick elastic walls because __________________________.

(a) Rapid blood flows at high pressure
(b) slow blood flows at low pressure
(c) Rapid blood flows at low pressure
(d) slow blood flows at high pressure

Question : The throbbing movements of the blood flow in the Arteries is called __________________________.

(a) Pulse
(b) Crest
(c) Peak
(d) Nest

Question : A resting person usually has a pulse rate between

(a) 72 and 80 beats per minute
(b) 82 and 90 beats per minute
(c) 62 and 70 beats per minute
(d) 52 and 60 beats per minute

Question : The blood vessels which carry carbon dioxide –rich blood from all parts of the body back to the heart are called

(a) Arteries
(b) Veins
(c) RBC
(d) Platelets

Question : The processes of removal of waste materials from the body is called

(a) Digestion
(b) Excretion
(c) Respiration
(d) Inhalation

Question : Find the excretory organ from the following

(a) Kidney
(b) Hand
(c) Fingers
(d) Head

Question : White patches formed in areas like underarms are due to

(a) Salts present in the sweat
(b) sugars present in the sweat
(c) Acids present in the sweat
(d) Bases present in the sweat

Question : The effect of sweat on the human body is

(a) It causes cooling
(b) it causes heating
(c) it causes freezing
(d) It causes melting

Question : The uric acid excreted by lizards is

(a) White in colour
(b) Red in colour
(c) Brown in Colour
(d) Black in colour

Question : ____________failure can be treated by the method of Dialysis.

(a) Heart
(b) Eye
(c) Kidney
(d) Liver

Question : The vascular tissue for the transport of water and nutrients in the plant is called

(a) Xylem
(b) Phloem
(c) Tissue
(d) Plasma

Question : Which of the following is the main circulatory fluid in our body ?

(a) Plasma
(b) Lymph
(c) Blood
(d) None of these

Question : The part of blood which does not have a nucleus.

(a) RBC
(b) WBC
(c) Platelets
(d) Plasma

Question : The process by which a plant loses water through the stomata is called:

(a) excretion
(b) transpiration
(c) respiration
(d) sweating

Question : The number of heart beats per minute is called

(a) pulse rate
(b) throbbing
(c) beating
(d) none of these

Question : Aquatic animals excrete cell waste mostly as

(a) ammonia
(b) oxygen
(c) carbon dioxide
(d) nitrogen

Question : The urine from kidneys passes to urinary bladder through

(a) Ureter
(b) Urinary tubules
(c) Urethra
(d) Fallopian tube

Question : The device used by the doctor to check up the heart beat is called

(a) anemometer
(b) thermometer
(c) barometer
(d) stethoscope

Question : During transpiration water is lost from the plant in the form of:

(a) water vapour
(b) liquid
(c) hydrogen and oxygen gas
(d) steam

Question : Which blood cells are a significant part of the immune system of the body?

(a) RBC
(b) WBC
(c) Platelets
(d) All of these

Question : Which chamber of heart receives oxygenated blood from pulmonary circulation?

(a) Left atrium
(b) Right ventricle
(c) Left ventricle
(d) Right atrium

Question : In the human urinary system, which of these in your opinion is the most important organ?

(a) kidney
(b) ureters
(c) urinary bladder
(d) urethra

Question : Name an instrumental device used to amplify the sound of heart.

(a) Stethoscope
(b) UV machine
(c) Both (a) and (b)
(d) Ultrasound machine

Question : In a tall tree, which force is responsible for pulling water and minerals from the soil?

(a) Gravitational force
(b) Transportation force
(c) Suction force
(d) Conduction force

Question : A liquid which carries disgerted food to various parts of our body is:

(a) pulse rate
(b) RBCs
(c) WBCs
(d) blood

Question : The thinnest blood vessels in the human body are:

(a) arteries
(b) capilharies
(c) veins
(d) any of these

Question : Which of the following mechanisms is not used by human beings for excretion of waste materials from their bodies?

(a) Exhalation
(b) Perspiration
(c) Defecation
(d) Transfusion

Question : Blood platelets help in

(a) formation of urine
(b) excretion of urine
(c) sweating
(d) blood clotting

Question : The fluid part of the blood is called

(a) Plasma
(b) RBC
(c) WBC
(d) Blood Platelets

Question : The fluid part of the blood is known as

(a) membrane
(b) plasma
(c) RBC
(d) WBC

Question : Which of the following mechanisms is not used by human beings for excretion of waste materials from their bodies?

(a) Exhalation
(b) Perspiration
(c) Defecation
(d) Transfusion

Question : What is the state of the blood?

(a) Solid
(b) Fluid
(c) Gas
(d) None of these

Question : Blood platelets help in

(a) formation of urine
(b) excretion of urine
(c) sweating
(d) blood clotting

Question : Heart rate increases during

(a) Bathing and eating
(b) Sleep and eating
(c) Exercise and fever
(d) Rest and indigestion

Question : Red pigment in Red Blood Cells is

(a) haemoglobin
(b) plasma
(c) arteries
(d) veins

Question : Any two substances that are transported by blood:

(a) water, air
(b) water and oxygen
(c) oxygen, food
(d) none of these

Question : A kidney, ureter and urinary bladder together are called-

(a) Respiratory system
(b) Excretory system
(c) Circulatory system
(d) Reproductive system

Question : Insects excrete uric acid in form of:

(a) liquid
(b) gases
(c) both a and b
(d) solids

Question : The vessels that transport water and minerals are called

(a) Stomata
(b) Vacuoles
(c) Phloem
(d) Xylem