CBSE Class 10 Sample Paper Science Solution - For 2024 Boards

Question 1

Question 2 Important

Question 3

Question 4

Question 5 Important

Question 6

Question 7

Question 8 Important

Question 9

Question 10 Important

Question 11

Question 12

Question 13 Important

Question 14 Important

Question 15

Question 16 Important

Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning]

Question 19 [Assertion Reasoning]

Question 20 [Assertion Reasoning] Important

Question 21

Question 22 Important

Question 23 (Choice 1) Important

Question 23 (Choice 2)

Question 24

Question 25 (Choice 1)

Question 25 (Choice 2) Important

Question 26

Question 27 Important

Question 28 (Choice 1) Important

Question 28 (Choice 2)

Question 29 Important

Question 30

Question 31 (i) Important

Question 31 (ii)

Question 31 (iii) Important

Question 32 (i)

Question 32 (ii) Important

Question 33 Important

Question 34 (Choice 1A)

Question 34 (Choice 1B) Important

Question 34 (Choice 2)

Question 35 (Choice 1) You are here

Question 35 (Choice 2A) Important

Question 35 (Choice 2B)

Question 36 (Choice 1) Important

Question 36 (Choice 2) Important

Question 37 (a) [Case Based]

Question 37 (b) - Choice 1 [Case Based] Important

Question 37 (b) - Choice 2 [Case Based]

Question 38 (a) [Case Based] Important

Question 38 (b) [Case Based]

Question 38 (c) - Choice 1 [Case Based] Important

Question 38 (c) - Choice 2 [Case Based]

Question 39 (a) [Case Based]

Question 39 (b) [Case Based] Important

Question 39 (c) - Choice 1 [Case Based]

Question 39 (c) - Choice 2 [Case Based] Important

Given below are certain situations. Analyze and describe its possible impact on a person:

(a) Testes of a male boy are not able to descend into scrotum during his embryonic development.

 

Answer:

If the testes of a male boy are not able to descend into scrotum, the sperm production will be hampered. This is because the production of sperm requires a temperature 1-2° lower than the normal body temperature which is provided by the scrotum.

 

(b) Vas deferens of a man is plugged.

 

Answer:

Vas deferens is a passage for the sperms to urethra. If it is blocked, the transfer of sperms further will not be possible. This will lead to infertility in that male.

 

(c) Prostate and seminal vesicles are not functional.

 

Answer:

The function of prostate and seminal vesicles is to produce different secretions which mix with the sperm to form semen. The function of these secretions is to provide nourishment to the sperm and also to provide a medium for their transport. If prostate gland and seminal vesicles are not functional, secretions will not be produced.

 

(d) Egg is not fertilised in a human female.

 

Answer:

When an egg is not fertilized in a human female, it lives for about one day. Then, the thickened lining of the uterus breaks leading to discharge of blood and mucus along with the unfertilised egg. This is called menstruation, which is a cyclical process happening every month.

 

(e) Placenta does not attach to the uterus optimally

 

Answer:

Placenta is a disc shaped structure in the uterus which helps in exchange of gases, nutrients and waste products between the growing embryo and mother. If the placenta does not attach the uterus optimally, nutrition and oxygen will not be provided to the growing embryo affecting its growth, which could have serious implications as well.

 

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo