CBSE Class 11 Transport in Plants Worksheet A

Multiple Choice Questions (MCQs)

Question. One of the following does not have a nucleus. This one is :
(a) red blood cell
(b) white blood cell
(c) guard cell
(d) epidermal cell

Answer : A

Question. The component of blood which makes chemicals known as antibodies is :
(a) platelets
(b) white blood cells
(c) red blood cells
(d) plasma

Answer : B

Question. An animal in which the oxygenation of blood does not take place in the lungs is :
(a) cow
(b) fish
(c) frog
(d) fox

Answer : B

Question. Which of the following carries substances upwards as well as downwards in a plant ?
(a) xylem
(b) companion cells
(c) phloem
(d) tracheids

Answer : C

Question. One of the following is not a constituent of blood. This one is :
(a) red blood cells
(b) white blood cells
(c) sieve plates
(d) platelets

Answer : C

Question. If a patient is put on dialysis, he is most likely suffering from a severe ailment of the :
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system

Answer : C

Question. Water absorption through roots can be increased by keeping the potted plants :
(a) in the shade
(b) in dim light
(c) under the fan
(d) covered with a polythene bag

Answer : C

Question. A blood vessel which carries blood back to the heart is :
(a) artery
(b) vein
(c) capillary
(d) platelet

Answer : B

Question. Blood is pumped from the heart to the entire body by the :
(a) lungs
(b) ventricles
(c) atria
(d) nerves

Answer : B

Question. The blood leaving the tissues becomes richer in :
(a) carbon dioxide
(b) water
(c) haemoglobin
(d) oxygen

Answer : A

Question. What prevents the backflow of blood inside the heart during contraction ?
(a) thick muscular walls of ventricles
(b) valves
(c) thin walls of atria
(d) all of the above

Answer : B

Question. Which of the following is the correct path taken by urine in our body ?
(a) kidney → ureter → urethra → bladder
(b) kidney → bladder → urethra → ureter
(c) kidney → ureter → bladder → urethra
(d) bladder → kidney → ureter → urethra

Answer : C

Question. In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body ?
(a) pisces and amphibians
(b) amphibians and reptiles
(c) amphibians only
(d) pisces only

Answer : D

Question. Which vein brings clean blood from the lungs into the heart ?
(a) renal vein
(b) pulmonary vein
(c) vena cava
(d) hepatic vein

Answer : B

Question. Which blood vessel does not carry any carbon dioxide ?
(a) pulmonary artery
(b) vena cava
(c) hepatic vein
(d) pulmonary vein

Answer : D

Question. It has been found that people living in very high mountains have many more red corpuscles in their blood than people living in plains. Which one of the following best accounts for this phenomenon ?
(a) the cold climate stimulates the production of red corpuscles to keep the body warm
(b) people of high mountains breathe more quickly
(c) the low air pressure requires more red corpuscles to supply the body cells with oxygen.
(d) the low air pressure in high mountains speeds up the blood circulation so that more red corpuscles are needed

Answer : C

Question. The phloem tissue in plants is responsible for the transport of :
(a) water
(b) water and minerals
(c) sugar
(d) all of the above

Answer : C

Question. Which of the following has a three-chambered heart ?
(a) pigeon
(b) lizard
(c) fish
(d) lion

Answer : B

Very Short Answer Type Questions

Question. With which human organ systems (or human systems) are the following associated ?
(i) vena cava (ii) glomerulus (iii) alveoli (iv) villi
Answer : (i) Circulatory system (ii) Excretory system (iii) Respiratory system (iv) Digestive system

Question. What is meant by ‘systolic pressure’ and ‘diastolic pressure’ ? What are their normal values ?
Answer :  The maximum pressure at which the blood leaves the heart through the main artery Aorta during contraction phase is called systolic pressure. The minimum pressure in the arteries during relaxation phase of the heart is called the diastolic pressure. The normal blood pressure values are: Systolic pressure: 120 mm Hg. Diastolic pressure: 80 mm Hg. 

Question. (a) What is meant by ‘heart beat’ ? What is the usual heart beat rate at rest ?
(b) What change occurs in heart beats if a person runs for a while ? Why ?
Answer :  (a) Heart beat: One complete contraction and relaxation of the heart is called a heart beat. The usual heartbeat rate at rest in a healthy person is 72 times /minute.
(b) The heart beats faster when a person runs for a while as the body needs more energy under these conditions.

Question. (a) What is blood ? Why is it red ?
(b) State the functions of blood in our body.
(c) Name a circulatory fluid in the human body other than blood.
Answer : (c) Lymph

Question. (a) What is meant by human circulatory system ? Name the organs of the circulatory system in humans.
(b) Draw a diagram of the human heart and label its parts.
(c) What is meant by the terms ‘single circulation’ and ‘double circulation’ ?
Answer :  (a) The human circulatory system is responsible for the transport of materials inside the human body.
The organs of the circulatory system are the heart, arteries, veins, and capillaries.
(b) Given below is an image of the human heart with its main parts.
(c) Single circulation: The circulatory system in which the blood passes through the heart only once in one complete cycle is known as single circulation.

Question. Describe the working of human blood circulatory system with the help of a suitable diagram which shows all the steps involved.
Answer :  The human circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). These systems are responsible for the flow of blood, oxygen, nutrients, as well as hormones to and from cells.
The human heart is a muscular organ divided into four chambers. The upper two chambers are called right and left atrium and the lower two chambers are called the right and the left ventricles. It is located just behind and slightly left of the breastbone.

Question. (a) Name the red pigment which carries oxygen in the blood.
(b) Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds ?
(c) How many chambers are there in the heart of : (i) an amphibian, (ii) a mammal, and (iii) a fish ?
(d) Describe the circulatory system in a fish.
Answer :  (a) Hemoglobin.
(b) It is necessary to separate the oxygenated blood from mixing with deoxygenated blood as mammals and birds have high energy needs because they constantly require energy to maintain their body temperature.
(c) (i) Three-chambered heart. (ii) Four-chambered heart. (iii) Two chambered heart.
(d) The fish has a two-chambered heart. Oxygenation of the blood takes place in the gills. The oxygenated blood from the gills is supplied to the body parts of the fish where oxygen is utilized and carbon dioxide enters into it making it deoxygenated. The deoxygenated blood returns to the heart to be pumped into gills again.

1. Name two anti-transpirants?

2. Define translocation?

3. When does wilting occur?

4. Why cell is called an osmotic system?

5. Distinguish between active transport & passive transport.

6. Give the main purposes of transpiration?

7. Explain pressure flow hypothesis for translocation of sugars in plants?

8. Explain why pure water has maximum water potential?

9. Describe the cohesive force theory of ascent of sap in plants?

Click on link below to download CBSE Class 11 Transport in Plants Worksheet A.