Practice Questions CBSE - Science Class 10 (2023 Boards)

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Question 3 Important

Question 4 Important

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Question 9 Important

Question 10

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Question 12 Important

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Question 16

Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning] Important

Question 19 [Assertion Reasoning] Important

Question 20 [Assertion Reasoning]

Question 21 (Choice 1) Important

Question 21 (Choice 2)

Question 22 Important

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Question 24 Important

Question 25 (Choice 1)

Question 25 (Choice 2)

Question 26 Important

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Question 28 Important

Question 29 (Choice 1)

Question 29 (Choice 2) Important

Question 30 Important

Question 31 (a)

Question 31 (b) Important

Question 32 (Choice 1)

Question 32 (Choice 2) Important

Question 33 (a)

Question 33 (b)

Question 33 (c) Important

Question 34 (a) - Choice 1

Question 34 (b) - Choice 1 Important

Question 34 (c) - Choice 1

Question 34 (a) - Choice 2 Important

Question 34 (b) - Choice 2]

Question 34 (c) - Choice 2 Important

Question 35 (a) - Choice 1 Important

Question 35 (b) - Choice 1 Important

Question 35 (c) - Choice 1 You are here

Question 35 (a) - Choice 2

Question 35 (b) - Choice 2 Important

Question 35 (c) - Choice 2

Question 36 Important

Question 37 (a) - Choice 1 [Case Based]

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

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

Question 38 (a) - Choice 1 [Case Based]

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

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

Question 39 (a) - Choice 1 [Case Based] Important

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

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

Question 39 (d) - Choice 1 [Case Based] Important

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

(c) What is the sequence of events that take place in human reproduction when an egg is not fertilised?

 

Answer:

(c) 

The egg can survive for a day in the reproductive system. 

  • It travels from the ovary , into the fallopian tube . This is when the uterus prepares a lining of blood on the inner side, in preparation of the zygote. 
  • In the case that the egg is not fertilised , it is shed along with the lining of the uterus out of the vagina as blood and mucus
  • This process is called menstruation and occurs once every month or so (30-32 days) in people with a uterus.

THE LINING BREAKS DOWN WHEN THE EGG IS NOT FERTILIZED - Teachoo.jpg

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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