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Transportation in Plants and Animals Solution DAV Class 7


If you are searching for DAV Class 7 Science Chapter 8 Transportation In Plants and Animals Question Answer. In this website you will find all the solutions of DAV NCERT and Other boards.Follow us for more solutions. 


SOMETHING TO KNOW

A. Fill in the blanks. 

1.Water and minerals are transported, to various parts of a plant, by a network of tubes, is called the Xylem. 

2.Haemoglobin  is the respiratory carrier in blood. 

3.The upper chambers of heart are known as Auricle while the lower chambers are called Ventricle

4. Septum is the muscular wall that divides the heart length wise. 

5.Excretion , in unicellular plants nad animals, takes place through diffusion. 

B Write true and False for the following statements. 

1.Phloem transports food, from the leaves to the other parts of the plant. True

2.Transportation is harmful for the plants. False

3.Oxygenated blood, from the lungs, flows into the left atrium and then to all other parts of body. False 

4. Arteries carry the oxygen-deficient blood back to heart. False 

5 Platelets help in clotting of blood. True 

6.The red colour of the blood is due to the presence of plasma . True 

7. Urine is passed out of the body through the urethra. True 

C. Tick the correct option. 

1 A process, ther helps in transportation, in unicellular organisms is -

Answer -Diffusion

2.In plants, water is transported by the -

Answer-Xylem

3.The blood vessels, having thick elastic walls are called-

Answer- Arteries 

4.Which part of the blood has haemoglobin? 

Answer- RBCs

5.Urine gets collected in the -

Answer-Urethra

D. Answer the following the questions in brief. 

1.What will happen if the xylem tissue gets damaged in a branch of a tree? 

Answer-Since xylem is the channel through which water and minerals are transported to different parts of a plant, damaged xylem in a branch would mean that branch shall not get proper supply of water and minerals. Lack of water and  minerals will result in no photosynthesis in leaves of plants of they branch. As a result, that branch shall not be able to get nutrition and would die in the long run. 

2. Define transpiration. 

Answer-Loss of water vapour through stomata and lenticels in plants is called transpiration. 

3.Name the three types of blood vessels. 

Answer-Three types of blood vessels are :-arteries, veins and capillaries. 

4.State any two functions of blood. 

Answer-(a) Carrying oxygen to different parts of body 

(b) Carrying nutrients to different parts of body. 

5.Define the term 'pulse term'

Answer-The number of pulses per minute is called pulse rate. The throbbing which can be felt near wrist and at some other places of human body is called pulse. 

E. Answer the following questions. 

1.Briefly explain the transport of water and minerals in plants. 

Answer-Transportation of water and minerals in plants happen in following steps:-

•Plants obtain water and minerals from soil. 

•Roots absorb water and minerals through root hairs. 

•The absorbed water and minerals are transported to other parts of plant through xylem. 

2.Describe , in brief the function of heart. 

Answer-Functions of heart are:-

•Heart pumps blood to different parts of body. 

•On contraction hearts squeeze the blood through the atria and then through the ventricles. 

•When oxygen -deficient blood comes, the heart pumps it to the lungs. 

3.State the function of three types of blood vessels. 

Answer-Three types of blood vessels are-

•Arteries-Carry blood from heart to different organs. 

•Veins-Carry blood from different organs to heart 

•Capillaries- Supply blood to and remove blood from cells and tissues. 

4.Give one function each of RBC, WBC and platelets . 

Answer-•RBC-Carry Oxygen. 

•WBC-Fight against diseases. 

•Platelets-Carry out blood clotting. 

5.Draw a neat and well labelled diagram of human Excretory System. 

Ans. See page no. 123 of your book. 

VALUE BASED QUESTION

Mr Vidhaan a very dedicated, disciplined and devoted teacher, decided to spend his post retirement life in his village. He spent his time there in helping the village children to acquire the basic skills of three R's. The village elders would often say :"Mr Vidhaan spends all hi time in transporting his knowledge and skills to our children. He is as important to us as the roots are to the plants. "

1.State the values displayed by Mr. Vidhwan. 

Answer-Caring nature for children, shares his knowledge. 

2.Name the substance and it's source which is transported to other parts of the plant by {a}roots {b}leaves 

Answer:(a) Water comes from soil, (b) Food is made in leaves 


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