Worksheets With Solutions: Transport of Substances in Animals and Plants Class 7 Worksheet Science Chapter 7

Section A: MCQs

Q.1. Which of the following is not a substance that needs to be transported in animals?
(a) Oxygen
(b) Carbon dioxide
(c) Water
(d) Glucose

Correct Answer is Option (d)
Animals require the transport of various substances, such as oxygen, carbon dioxide, water, and nutrients like glucose. Glucose is produced through the process of cellular respiration and is used as an energy source by cells. However, it is not a substance that needs to be transported in animals since it is produced within cells and used locally.

Q.2. What is the function of xylem in plants?
(a) Transport of water and minerals
(b) Transport of glucose
(c) Transport of oxygen
(d) Transport of carbon dioxide

Correct Answer is Option (a)
Xylem is a specialized tissue in plants that is responsible for the transport of water and minerals from the roots to the rest of the plant. It consists of long, hollow cells called tracheids and vessel elements that are interconnected to form a network of tubes. Xylem also provides structural support to the plant.

Q.3. Which of the following is not a part of the excretory system in humans?
(a) Liver
(b) Kidney
(c) Lungs
(d) Bladder

Correct Answer is Option (d)
The excretory system in humans is responsible for removing waste products from the body. It consists of several organs, including the kidneys, liver, lungs, and skin. The kidneys filter the blood and remove waste products in the form of urine, which is then transported to the bladder for storage and elimination. The liver detoxifies harmful substances and produces bile, which is excreted into the digestive system. The lungs eliminate carbon dioxide, and the skin eliminates sweat.

Q.4. Which of the following is not a substance that needs to be transported in plants?
(a) Glucose
(b) Water
(c) Oxygen
(d) Carbon dioxide

Correct Answer is Option (d)

Plants require the transport of various substances, such as water, minerals, and nutrients like glucose, to support their growth and metabolism. Oxygen is also needed for cellular respiration, which generates energy for the plant. However, carbon dioxide is not a substance that needs to be transported in plants since it is absorbed from the surrounding air by the leaves and used in photosynthesis.

Q.5. Which of the following is responsible for the transport of oxygen in animals?
(a) Red blood cells
(b) White blood cells
(c) Platelets
(d) Plasma

Correct Answer is Option (a)
Red blood cells, also called erythrocytes, are responsible for the transport of oxygen in animals. They contain a protein called hemoglobin that binds to oxygen in the lungs and carries it to the rest of the body. Red blood cells are produced in the bone marrow and have a characteristic biconcave shape that maximizes their surface area for gas exchange. White blood cells are part of the immune system and protect the body against infections, platelets are involved in blood clotting, and plasma is the liquid portion of blood that carries nutrients and waste products.

Section B: Short Questions

Q.1. What is the difference between the transport of substances in animals and plants?

In animals, substances are transported through the circulatory system, while in plants, substances are transported through the xylem and phloem.

Q.2. Explain the process of transpiration in plants.

Transpiration is the process through which plants lose water through the stomata of the leaves. This loss of water creates a suction force that helps in the transport of water and minerals from the roots to the leaves.

Q.3. How does the circulatory system in humans help in the transport of substances?

The circulatory system in humans helps in the transport of substances by carrying oxygen and nutrients to the cells and removing waste products such as carbon dioxide and urea.

Q.4. What is the function of the stomata in plants?

Stomata are small openings on the leaves of plants that allow for the exchange of gases, including oxygen and carbon dioxide, between the plant and the environment.

Q.5. What is the role of the nephrons in the excretory system of humans?

Nephrons are the functional units of the kidneys, which help in the filtration of blood and removal of waste products from the body.

Section C: Fill in the Blanks (5 Questions)

The transport of substances in animals is done by the circulatory system. The circulatory system is made up of the heart, blood vessels, and blood. The heart pumps blood through the blood vessels to all parts of the body.

Q.2. The process of water movement through the plant is called ________.

The process of water movement through the plant is called transpiration. Transpiration is the process by which water is absorbed by the plant roots and is transported to the leaves, where it is released into the atmosphere as water vapor.

Q.3. The ________ system helps to remove waste products from the body.

The excretory system helps to remove waste products from the body. The excretory system is made up of the kidneys, ureters, bladder, and urethra. The kidneys filter waste products from the blood, and the ureters, bladder, and urethra help to remove these waste products from the body.

Q.4. The ________ vessels carry blood from the heart to all parts of the body.

The arteries carry blood from the heart to all parts of the body. The heart pumps oxygen-rich blood from the left ventricle through the aorta and into the arteries.

Q.5. The process of transport of food in plants is called ________.

The process of transport of food in plants is called translocation. Translocation is the process by which food, or glucose, is transported from the leaves to other parts of the plant.

Section D: Match the Columns (5 Questions)

Section E: True or False (5 Questions)

False
The transport of substances in plants is done through the vascular system, which consists of the xylem and phloem vessels.

Q.2. The circulatory system of humans carries oxygen and nutrients to all parts of the body. 

True
The circulatory system of humans carries oxygen and nutrients to all parts of the body and helps in the removal of waste products from the body.

Q.3. The excretory system helps in the removal of waste products from the body. 

True
The excretory system helps in the removal of waste products from the body.

Q.4. The phloem vessels carry water from the roots to the leaves of the plant. 

False
The phloem vessels carry food, or glucose, from the leaves to other parts of the plant.

Q.5. The transport of substances in animals is necessary for their survival. 

True
The transport of substances in animals is necessary for their survival as it helps in the distribution of oxygen, nutrients, and other essential substances throughout the body.