CBSE Class 7 Science Transportation in Animals and Plants MCQs

Question. Which of the following is the main circulatory fluid in our body ?
(a) Plasma
(b) Lymph
(c) Blood
(d) None of these

Answer:  C

Question. The part of blood which does not have a nucleus.
(a) RBC
(b) WBC
(c) Platelets
(d) Plasma

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. The number of heart beats per minute is called
(a) pulse rate
(b) throbbing
(c) beating
(d) none of these

Answer:  A

Question. Aquatic animals excrete cell waste mostly as
(a) ammonia
(b) oxygen
(c) carbon dioxide
(d) nitrogen

Answer:  A

Question. The urine from kidneys passes to urinary bladder through
(a) Ureter
(b) Urinary tubules
(c) Urethra
(d) Fallopian tube

Answer:  A

Question. The device used by the doctor to check up the heart beat is called
(a) anemometer
(b) thermometer
(c) barometer
(d) stethoscope

Answer:  D

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

Answer:  A

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

Answer:  B

Question. Which chamber of heart receives oxygenated blood from pulmonary circulation?
(a) Left atrium
(b) Right ventricle
(c) Left ventricle
(d) Right atrium

Answer:  A

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

Answer:  A

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

Answer:  A

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

Answer:  C

Question. A liquid which carries disgerted food to various parts of our body is:
(a) pulse rate
(b) RBCs
(c) WBCs
(d) blood

Answer:  D

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

Answer:  D

Question. What is the state of the blood?
(a) Solid
(b) Fluid
(c) Gas
(d) None of these

Answer:  B

Question. Blood platelets help in
(a) formation of urine
(b) excretion of urine
(c) sweating
(d) blood clotting

Answer:  D

Question. Heart rate increases during
(a) Bathing and eating
(b) Sleep and eating
(c) Exercise and fever
(d) Rest and indigestion

Answer:  C

Question. Red pigment in Red Blood Cells is
(a) haemoglobin
(b) plasma
(c) arteries
(d) veins

Answer:  A

Question. Any two substances that are transported by blood:
(a) water, air
(b) water and oxygen
(c) oxygen, food
(d) none of these

Answer:  C

Question. A kidney, ureter and urinary bladder together are called-
(a) Respiratory system
(b) Excretory system
(c) Circulatory system
(d) Reproductive system

Answer:  B

Question. Insects excrete uric acid in form of:
(a) liquid
(b) gases
(c) both a and b
(d) solids

Answer:  D

Question. The vessels that transport water and minerals are called
(a) Stomata
(b) Vacuoles
(c) Phloem
(d) Xylem

Answer:  D

Question. Which blood group is called as universal donor?
(a) O
(b) A
(c) B
(d) AB

Answer:  A

Question. The blood of which of the following is rich in carbon dioxide:
(a) arteries
(b) veins
(c) capillaries
(d) none of these

Answer:  B

Question. Manu wanted to find out if his heartbeat rate changed after he ran. These are the things he recorded.  Which of them is NOT required for him to find the answer?
a) The number of heart beats per minute before running
b) The number of heart beats  per minute immediately after running
c) His body temperature after running
d) All the above three are required.

Answer:  C

Question. What happens in an athlete's body, 20 seconds after he starts running a race?
a) The heart pumps more blood to the legs.
b) The muscles begin to tighten.
c) Fluids pour into the stomach.
d) The lungs need more air.

Answer:  A

Question. What can be concluded from the given data?

Question. The question is related to this table showing the amount of blood flowing through the various organs at different times in the human body (in appropriate units.) 
a) The total blood volume of the human body increases during strenuous exercise.
b) The blood flow in different organs changes in response to the changing needs of the body.
c) The kidneys and some other organs stop functioning during strenuous exercise.
d) (The data is incorrect since the blood flow cannot be different in different parts of the body)

Answer:  B

Question. Which of these units could blood flow be expressed in?

 
Question. The question is related to this table showing the amount of blood flowing through the various organs at different times in the human body (in appropriate units.) 
a) liters per kilogram
b) milliliters per minute
c) meters per second
d) seconds per centimeter cubed

Answer:  B

Question. Which of the following is responsible for blotting paper absorbing ink or water?
a) Capillary action.
b) Surface tension.
c) Reverse osmosis.
d) Diffusion

Answer:  A

Question. Blood circulating in our body follows a particular sequence. Which of the following is the correct sequence of blood flow?

Answer:  B

Question. Aalapi was taught in her school that transpiration is a process by which plants lose water in the form of vapour through their leaves. To check this, she took a plant and placed an open plastic bag over some of the leaves (as shown in the figure) and left it for a day.    Will she be able to check if transpiration occurred?

a) Yes. The water vapour will condense and form droplets inside the plastic bag.
b) Yes. The water vapour will condense and form droplets outside the bag.
c) No. The water vapour will escape from the open plastic bag.
d) No. The water given out will be absorbed back by the leaves.

Answer:  C

Question. The given picture shows the seed of a plant called cocklebur. Choose the correct method by which this seed is dispersed.

a) carried by water
b) carried by wind
c) carried on an animal's fur
d) eaten by an animal

Answer:  C

Question. Which is the part of the flower that develops into a seed?

a) Ovary
b) Ovule
c) Anther
d) Style

Answer:  B

Question. Sriram heard somewhere that lettuce seeds would not germinate unless they were covered with soil. To check this, he planted 1 lettuce seed under a layer of soil and placed another on top of the soil.  He found that both seeds germinated, though the one below the soil germinated earlier. What should Sriram do now?
a) Conclude that what he heard was correct.
b) Conclude that what he heard was wrong.
c) Repeat the experiment with two seeds, but placing both below the soil.
d) Repeat a similar experiment but using about 10 seeds in each group.

Answer:  D

Question. Which of these plant parts become the seeds?
a) pollen grains
b) carpels
c) ovules
d) Anthers

Answer:  C

Question. It is known that light is not required for moist pea seeds to germinate. However, dry seeds will not germinate even if there is light. Lata sets up 4 experiments using similar pea seeds:
1. Dry pea seeds kept in light.
2. Dry pea seeds kept in the dark 
3. Moist pea seeds kept in light 
4. Moist pea seeds kept in the dark 
In which case(s) will the seeds germinate?
a) only case 1
b) only case 3
c) cases 3 and 4
d) cases 1 and 3

Answer:  C

Question. Which part of the flower protects the young flower when it is a bud ?
a) Sepal
b) Stamen
c) Stigma
d) Petal

Answer:  A

Question. Study the experiment described here carefully:
Items required: 4 saucers and 4 pieces of blotting paper, some seeds of plant 'X', some seeds of plant 'Y', water and salt. 
Procedure: Each saucer was covered with a piece of blotting paper. The blotting papers of saucers 1 and 2 were moistened with water while the blotting papers of saucers 3 and 4 were moistened with salt water. The seeds of 'X' were sown in saucers 1 and 3 and the seeds of 'Y' in saucers 2 and 4. All the four saucers were kept on the window-sill. Blotting papers 1 and 2 were kept moist with water and blotting papers 3 and 4 with salt water.
Observation: After a day, it was seen that the seeds in saucers 1, 2 and 3 germinated but the seeds in 4 died.
What can we conclude from this experiment?

a) Seeds do not germinate where salt is present.
b) Seeds germinate only where salt is present
c) There can be no definite conclusion from this experiment
d) Some seeds do germinate in salt water and others do not.

Answer:  D

Question. Seeds develop from which of these parts of a plant?
a) Leaf
b) Stem
c) Root
d) Flower

Answer:  D