Solution of Life Processes (Page No - 72 (Part - 2))- Biology by Lakhmir Singh, Class 10 Class 10 Notes | EduRev

Class 10 Biology Solutions By Lakhmir Singh & Manjit Kaur

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Class 10 : Solution of Life Processes (Page No - 72 (Part - 2))- Biology by Lakhmir Singh, Class 10 Class 10 Notes | EduRev

The document Solution of Life Processes (Page No - 72 (Part - 2))- Biology by Lakhmir Singh, Class 10 Class 10 Notes | EduRev is a part of the Class 10 Course Class 10 Biology Solutions By Lakhmir Singh & Manjit Kaur.
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Question 33:
(a) Draw a labelled diagram of (z) a xylem vessel, and (ii) a sieve tube (or phloem).
(b) What are the differences between the transport of materials in xylem and phloem ?
Solution :

(a) (i)

Solution of Life Processes (Page No - 72 (Part - 2))- Biology by Lakhmir Singh, Class 10 Class 10 Notes | EduRev

The Structure of xylem vessels

(ii)

Solution of Life Processes (Page No - 72 (Part - 2))- Biology by Lakhmir Singh, Class 10 Class 10 Notes | EduRev

The Structure of phloem (made of sieve tubes)

(b)

Xylem

Phloem

(i) Xylem Transports water and minerals

Phloem transports food material which the plants make

(ii) It transports material in upward direction only

It transports material in all the directions


Question 34:
Match the terms in column I with their uses in column II 

Column I
Column II
(i) Heart
(a) Pipes for transport in humans
(ii) Arteries and Veins 
(b) Clotting of blood
(iii) Xylem vessels
(c) pumping organ
(iv) RBC
(d) Water transport in plants 
(v) Platelets
(e) Carrier of Oxygen


Solution : 

i
c
ii
a
iii
d
iv
e
v
b


Question 35:
Define excretion. Name the excretory unit of a kidney.
Solution :
The process of removal of toxic waste from the body of an organism is called excretion. The excretory unit of a kidney is called nephron.

Question 36:
(a) What job is done by the kidneys ?
(b) What do kidneys excrete ?
(c) What is the name of the tubes which connect the kidneys to bladder ?
(d) What does the bladder in our body do ?
Solution :
(a) The kidneys remove the poisonous substance urea, other waste salts and excess water from the blood in the form of yellowish liquid called urine.(b) Urea.(c) Ureters.(d) Urinary bladder is a bag which stores the urine temporarily till it is excreted out.

Question 37:
Why do some people need to use a dialysis machine ? What does the machine do ?
Solution :
When there is a kidney failure then dialysis machine is used. Dialysis cleans the blood of a person by separating the waste substance (urea) from the blood.

Question 38:
What is the liquid part of the blood called ? What is the function of platelets in the blood ?
Solution :
The liquid part of the blood is called plasma. Platelets help in the coagulation of blood in a cut or wound.


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