SEBA Class 7 Science Chapter 3 Transportation in Animals and Plants – Textbook Solutions & MCQ (Part II)
Find Class 7 Science Chapter 3 “Transportation in Animals and Plants” Solutions for SEBA Assam (English Medium) students. This chapter, from Part II of the Science book, explains how nutrients, gases, and waste materials are transported in animals and plants. It covers the circulatory system in animals, blood components, the structure and function of the heart, and excretion in organisms. In plants, the chapter explains how water, minerals, and food are transported through xylem and phloem. Our solutions provide detailed textbook answers, multiple-choice questions (MCQs), and in-depth explanations, ensuring better understanding and exam preparation.
Class 7 Science
Chapter – 3 (Part I) Ospin Academy
Transportation in Animals and Plants
EXERCISE
Q. 1. Match structures given in column I with functions given in column II.
|
Column – I |
Column – II |
|---|---|
|
(i) Stomata |
(a) Absorption of water |
|
(ii) Xylem |
(b) Transpiration |
|
(iii) Root hairs |
(c) Transport of food |
|
(iv) Phloem |
(d) Transport of water |
|
(e) Synthesis of carbon hydrates. |
Ans:
|
Column-I |
Column-II |
|---|---|
|
(i) Stomata |
(b) Transpiration |
|
(ii) Xylem |
(d) Transport of water |
|
(iii) Root hairs |
(a) Absorption of water |
|
(iv) Phloem |
(c) Transport of food |
Q. 2. Fill in the blanks:
(i) The blood from the heart is transported to all parts of the body by the ____________.
Ans: Arteries.
(ii) Hemoglobin is present in ____________ cells.
Ans: Red Blood Cells.
(iii) Arteries and veins are joined by a network of ____________.
Ans: Capillaries.
(iv) The rhythmic expansion and contrac- tion of the heart is called …………
Ans: Heart beat.
(v) The main excretory product in human beings is ____________.
Ans: Urine.
(vi) Sweat contains water and ____________.
Ans: Urea.
(vii) Kidneys eliminate the waste materials in the liquid form called ____________.
Ans: Urine.
(viii) Water reaches great heights in the trees because of suction pull caused by ____________.
Ans: Transpiration.
Q. 3. Choose the correct options:
(a) In plants, water is transported through:
(i) Xylem
(ii) Phloem
(iii) Stomata
(iv) Root hair
Ans: (i) Xylem.
(b) Water absorption through roots can be increased by keeping the plants:
(i) in the shade
(ii) in dim light
(iii) under the fan
(iv) covered with a polythene bag.
Ans: (iii) under the fan.
Q. 4. Why is transport of materials necessary in a plant or an animal? Explain.
Ans: Transport of materials is necessary for plant or animal because due to it nutrients are made available to all the parts of body. If the transport of necessary nutrients does not take place in the body, the body will not be able to survive.
Q. 5. What will happen if there are no platelets in the blood?
Ans: The blood platelets are responsible for the clotting of the blood. When some injury occurs, blood starts flowing. But it clots on its own. If there are no platelets, the blood will not be able to clot and keep on flowing.
Q. 6. What are stomata? Give two functions of stomata.
Ans: There are small openings on the lower surface of the leaves and stems. These pores are called stomata. These openings are covered with guard cells.
Two functions of stomata are:
(i) It helps in the transpiration of water i.e. the loss of excess water from the plant.
(ii) Loss of water from the stomata creates an upward pull i.e. a suction pull which helps in absorption of water to great height in tall trees.
Q.7. Does transpiration serve any useful function in the plants? Explain.
Ans: (i) It produces cooling effect. Thereby saving the delicate cells from the heat of the sun light.
(ii) Transpiration helps in the movement of water from roots upwards.
Q.8. What are the components of blood?
Ans: There are four components of blood:
(i) The Red Blood Corpuscles (R.B.C) or Erythrocytes: These are responsible for transporting oxygen to different parts of the body with the help of hemoglobin.
(ii) White Blood Corpuscles (W.B.C.) or Leucocytes: They protect our body against harmful germs and diseases. That is why they are called soldiers of the body.
(iii) Platelets or Thrombocytes: They help in clotting of blood at the time of an injury.
(iv) Plasma: It is the fluid medium which transports digested food as well as metabolic waste products.
Q.9. Why is blood needed by all the parts of a body?
Ans: Blood is needed by all the parts because it contains the digested food in it. It supplies the digested food to various parts of the body and provides energy to them which helps the body to perform various functions.
Q.10. What makes the blood look red?
Ans: A red coloured pigment called hemoglobin gives the blood its red color. This pigment helps in carrying oxygen to various parts of the body by blood.
Q.11. Describe the function of the heart.
Ans: The heart functions in the following way.
The right auricle and ventricle receives blood with carbon dioxide from all the parts of the body. The collected blood is then pumped to the lungs for the purification. In lungs the exchange of gases take place and purified blood is sent back to the left auricle. It pumps it to the left ventricle, which in turn pumps off the purified blood to all the parts of the body through arteries.
Q.12. Why is it necessary to excrete waste product?
Ans: The build up of waste and poisonous products in our body is always harmful. The waste products like urea etc., are toxic. When such toxic materials are not removed from the body, they get mixed with blood and can damage the cells of the body, thus proving fatal. It is, therefore, necessary to remove such poisonous waste materials from our body.
Q.13. Draw a diagram of the human excretory system and label the various parts.
Ans:
Q1: What is transportation in animals and plants?
Transportation in animals and plants refers to the movement of nutrients, gases, and waste materials through specialized systems like the circulatory system in animals and vascular tissues in plants.
Q2: How does the circulatory system work in animals?
The circulatory system consists of the heart, blood, and blood vessels, helping in oxygen and nutrient transportation, waste removal, and immune response.
Q3: What are xylem and phloem in plants?
Xylem transports water and minerals from roots to leaves, while phloem carries food (sugar) from leaves to other parts of the plant.
Q4: Where can I find Class 7 Science Chapter 3 solutions for SEBA Assam?
You can find detailed textbook solutions, MCQs, and explanations for SEBA Assam Class 7 Science Chapter 3 (Part II) on this page.
Q5: Where can I find solutions for all Class 7 Science chapters?
To get solutions for all Class 7 Science chapters, Click Here
