CBSE Class 7 Science Chapter-7 Important Questions - Free PDF Download
Very Short Answer Questions: 1 mark
Multiple Choice Questions:
1. The circulatory fluid in humans is
a) Blood b) Urine c) Water d) Oil
Ans: a) Blood
2. The fluid portion of the blood is called as
a) Erythrocyte b) Xylem c) Platelets d) Plasma
Ans: d) Plasma
3. The oxygen-carrying component is called
a) RBC b) WBC c) Platelets d) Plasma
Ans: a) RBC
4. The function of the platelets is
a) Transport of oxygen
b) Immunity
c) Clotting
d) Transport of carbon dioxide
Ans: c) Clotting
5. Waste products in blood are filtered by
a) Heart b) Lungs c) Uterus d) Kidneys
Ans: d) Kidneys
6. Water carrying tissue in plants is
a) Xylem b) Phloem c) Veins d) Roots
Ans: a) Xylem
7. Food transporting tissue in plants is
a) Xylem b) Phloem c) Veins d) Roots
Ans: b) Phloem
8. Transpiration occurs through
a) Stomata b) Roots c) Lungs d) Blood
Ans: a) Stomata
9. Transpiration is a means
a) To cool plant body
b) to absorb water from the soil
c) both a and b
d) neither a nor b
Ans: c) Both a and b
10. The circulatory fluid in sponges is
a) Blood b) Urine c) Water d) Oil
Ans: c) Water
Short Answer Questions: 3 marks
11. What is the role of blood in the body?
Ans: Blood is the body’s circulatory fluid and is in charge of transporting substances. The following is a list of the functions of blood in our bodies:
Transports oxygen to all cells of the body.
It removes carbon dioxide from the body’s cells.
Transports nutrients to all cells of the body.
Removes waste from the cells of the body.
Provides the body with immunity due to the presence of WBC.
Helps in maintaining body temperature.
12. Explain the components of the circulatory system in humans
Ans: Heart, blood, and blood arteries make up the circulatory system in our bodies.
Heart: It is a muscular organ located in the center of the chest. It is in charge of pumping blood into blood vessels for transportation throughout the body.
Blood: Blood is a type of fluid tissue that transports substances throughout the body. It is made up of plasma and blood cells. Red blood cells (erythrocytes), white blood cells (leucocytes), and platelets are the three types of blood cells. Each has a distinct purpose in the body.
Blood Vessels: Blood is carried through these tube-like structures. Arteries, veins, and capillaries are the three types of blood vessels.
13. How does transport occur in sponges?
Ans: Transportation in sponges occurs with the help of water. Sponges are aquatic animals. They are always surrounded by water. They do not possess any specific tissue or organ for transportation. Water enters their body through numerous pores present on their body surface and helps in the exchange of materials in the body along with the removal of waste.
14. What is transpiration? Explain its importance.
Ans: Evaporation of water from the aerial regions of plants, such as leaves, is known as transpiration. It happens through tiny pores present underside of the leaf surface known as stomata. Roles of transpiration in plants are as follows:
Transpiration cools down the overall temperature of the plant.
Transpiration creates a suction pull which helps in absorption from the soil with help of roots.
It also helps in the removal of waste from plants that are dissolved in water.
15. Explain how wastes are removed from the body
Ans: Excretion is the process of removing nitrogenous wastes from the human body. The excretory system is a specialized organ system in the human body that is responsible for elimination. The excretory system consists of a pair of kidneys, a pair of ureters, a urinary bladder, and a urethra. The wastes in the blood are filtered by the kidneys, which then form urine. The ureters transfer the urine produced by each kidney to the urinary bladder, where it is held until it can be excreted by the urethra.
Long Answer Questions: 5 marks
16. Explain the structure of the heart with a diagram.
Ans:
The human heart is divided into four chambers. The upper two upper chambers are known as atria and the ventricles are the two lower chambers. The heart is divided into right and left sides. A septum separates the right and left sides completely and prevents the mixing of oxygenated blood with deoxygenated blood.
Valves separate the atria and ventricles, preventing blood from flowing backward.
17. How does the transport of food and water occur in plants?
Ans: Plants lack specialized organs and organ systems for substance transportation. Instead, they have specialized tissues for this purpose. A tissue is a collection of cells that share a common purpose. Xylem and Phloem are two vascular tissues responsible for the transportation of water and food in plants.
Xylem is a tissue that looks like a tube or a vessel but has no cross walls. This is responsible for moving water from the roots to the leaves. The suction force provided by transpiration pull is required for water movement. The loss of water from the aerial regions of plants is known as transpiration.
Xylem is a tissue that looks like a tube or a vessel but has no cross walls. This is responsible for moving water from the roots to the leaves. The suction force provided by transpiration pull is required for water movement. The loss of water from the aerial regions of plants is known as transpiration.
18. What are blood vessels? Compare the different blood vessels.
Ans: The tubes or conduits via which blood is delivered to bodily tissues are known as blood vessels.
Transportation in Plants and Animals Class 7- Important Questions
Transportation in plants and animals talks about how food and other materials are transported inside the body. Along with this, it also provides knowledge about various transportation systems in the animal body and plants.
Important Questions on Transportation in Plants And Animals Class 7
The important topics covered in transportation in plants and animals are mentioned below.
Circulatory System
This organ system of the body is responsible for the transportation of certain important materials in the body.
The materials transported include carbon dioxide, cells, nutrients, etc.
The transportation of materials in the body takes place through the blood.
The primary parts of the circulatory system are:
Heart, veins, and arteries.
The Main Parts of The Circulatory System of The Human Body Include
Blood:
It is the red colour fluid flowing through the blood vessels in the body. It acts as the transportation medium for essential substances in the body, including oxygen and nutrients. The components of blood are:
Blood plasma
Red blood cells (RBCs)
White blood cells (WBCs)
Blood platelets
Blood Vessels
These are the tube-like structures present in the body, which are responsible for blood transportation. There are mainly two types of blood vessels in the body. These are differentiated on the basis of the functions they perform. These are:
Arteries: These blood vessels carry the blood rich in oxygen from the heart to various body parts.
Veins: These blood vessels carry the blood rich in carbon dioxide from the various body parts to the heart.
Heart:
This is the most important organ of the body, responsible for pumping blood. It is located in the chest cavity.
Excretory System
Excretion is the process through which waste products of the body are removed from the cells in living organisms. In human beings, excreta is in the form of carbon dioxide, faeces, and urine.
The Parts of The Excretory System Include
Kidney
There are two kidneys present in the human body. These are responsible for filtering out the unwanted substances from the body.
Ureters
These are the tube-like structures connecting the urinary bladder and kidney together. They allow the urine to pass from the kidney to the bladder.
Urinary Bladder
The urine is stored in the urinary bladder.
Urethra
The urine moves out of the body through this muscular tube.
Transportation in Plants
The transportation of materials in plants takes place through the process of osmosis. It is the movement of solvent molecules in plants from a lower solute concentration region to the higher solute concentration region through a semipermeable membrane.
The Various Parts of Plants Through Which Transpiration Takes Place Includes
Root hair: These are responsible for increasing the surface area of plants for absorption.
Phloem: This tissue transports food produced by leaves to all parts of the plant.
Xylem: This tissue is responsible for the transportation of water and nutrients in the plants.
Transpiration: Under this process, loss of excess water takes place from the leaves of the plants.
Transportation in Plants And Animals Class 7 Important Questions
1. Where is the heart located?
The heart is located in the chest cavity where the lower tip of the heart is slightly tilted towards the left.
2. What is hemoglobin?
It is the red colored pigment present in red blood cells that carry oxygen with it for transportation.
3. How many blood groups is the human blood divided into?
The human blood is divided mainly into four groups, namely, A, B, O, and AB.
4. What is blood?
Blood is a fluid tissue (also called connective tissue) that performs the task of transportation of nutrients and oxygen to the cells and taking away carbon dioxide and waste products.
The fluid part present in the blood is called plasma, and several nutrients and salts are dissolved in it.
The Various Blood Cells Suspended In Plasma Are
Red blood cells (RBC)
White blood cells (WBC)
Platelets
5. What are blood platelets?
Blood platelets are the smallest cells present in the blood. When clumped together, they lead to forming blood clots, which helps in the prevention of blood loss in case of bleeding. Also, in case of an injury, they prevent excessive damage by binding together at the damage site.
6. What is the pulmonary circuit?
The pulmonary circuit is defined as the network of arteries and veins which connect the heart and lungs. The deoxygenated blood is carried from the blood to the lungs for oxygenation. This oxygenated blood further returns to the heart and is pumped throughout the body.
7. What are kidneys?
Kidneys are the main excretory organ of the human body which are bean-shaped and reddish in colour. On each of the spine, there is a kidney present.
The kidney contains millions of tiny tubules that act as microscopic filters, filtering out harmful substances from the blood.
These harmful substances are removed from the body in a dissolved state through urine.
Thus, kidneys are like filters for our body.
8. What is transpiration?
Transpiration is defined as the loss of water from plants in the form of water vapour through the stomata which are present on leaves.
This process of transpiration also helps in the absorption and distribution of water through the plant’s roots. Transpiration exerts a straw-like effect on the plants leading to water moving up against the gravity in tubes. These tubes are formed of xylem cells.
Why are Important Questions fr Class 7 Science Chapter 7 - Transportation in Animals and Plants necessary?
Focus on key topics for efficient studying.
Prepares students for exams and reduces anxiety.
Reinforces understanding of fundamental concepts.
Teaches effective time management.
Enables self-assessment and progress tracking.
Strategic approach for higher scores.
Covers a wide range of topics for comprehensive understanding.
Supports exam preparation and boosts confidence.
Conclusion
Referring to the Class 7 Science Chapter 7 Extra Questions help students to increase their confidence during the exam preparation and it is one of the best study materials that can be used for free. All these topics are important not only from the exam point of view but also provides knowledge about the basic topics which we will use often in future studies and in our daily life. Having knowledge of Class 7 Science Chapter 7 Extra Questions will help the students to solve the tricky questions in an easy manner.
FAQs on Important Questions for CBSE Class 7 Science Chapter 7 - Transportation in Animals and Plants
1. What is the importance of transportation explained in Chapter 7 of Class 7 Science?
Transportation is important in living beings as it helps eliminate waste products from the body. Both in plants and animals, transportation helps to circulate essential nutrients, water, gases, and excretory products. Every cell in the living organism needs energy. The complex food molecules are broken down into simpler molecules and absorbed by the cells. Our body has a special transportation system that transports oxygen throughout the body and removes carbon dioxide. Likewise, in plants, transportation of materials takes place through a complex transportation system.
2. Why does the bleeding stop after a while?
When you get injured or have a cut on your body, bleeding occurs. It stops due to the clot formation in the blood. This process of clot formation is referred to as coagulation. During this process, platelets release some special protein molecules that help hold the blood cells firmly.
3. Write the definition of transportation.
Transportation is the process of the movement of molecules and ions through the cell membrane or bloodstream. In simple terms, transportation means carrying molecules from one place to another. Every organism requires oxygen and nutrients to conduct important life processes. Also, waste products produced inside the body need to be removed. Thus, the term transportation can be defined as a biological process in which essential nutrients are absorbed by specific organs and transported to other body organs.
4. Why is the transport of materials necessary in a plant or an animal?
Transportation of materials is necessary both in plants and animals because it helps them to grow properly. This process helps to carry out significant life processes. As every cell requires essential nutrients for proper growth and development, this biological process transports nutrients, water, and gases from one part of the body to another. Thus, transportation of materials is necessary.
5. How is transportation in plants different from that of transportation in animals?
In plants, the process of transportation occurs through vascular tissues that are the xylem and phloem. Xylem helps to transport water and minerals in plants and phloem helps in the transportation of food molecules. On the contrary, in animals, the process of transportation takes place through the circulatory system. The circulatory system helps to distribute nutrients to the other cells of the body. However, the waste materials are removed from the body through the excretory system.
