CBSE Important Questions(Long questions) for HOW DO ORGANISMS REPRODUCE

Question 1.
In what respect is the human male gamete different from the female gamete?
Question 2.
What are the advantages of sexual reproduction over asexual reproduction?
Question 3.
How does the embryo get nourishment inside the mother’s body?
Question 4.
How does reproduction help in providing stability to populations of species?
Question 5.
What changes are observed in the uterus if fertilization does not occur?
Question 6.
What is added to the sperm along the path of vas deferens ? Describe in brief?
Question 7.
In a bisexual flower, inspite of young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation?
Question 8.
Explain how is the DNA content maintained during the process of reproduction?
Question 9.
What is meant by menstruation? Why does it take place? How long does this process last?
Question 10.
What will happen when testosterone is released in the male reproductive system?
Question 11.
(a) Explain the term:-
(b) What is the average duration of human pregnancy?
Question 12.
Explain vegetative propagation with the help of two examples? List two advantages of vegetative propagation?
Question 13.
What is meant by the term puberty? Give an example of the changes seen during puberty?
Question 14.
What are chromosomes? Explain how is sexually reproducing organisms the number of chromosomes in the pregnancy is maintained?
Question 15.
Distinguish between a gamete and a zygote? Explain their role I sexual reproduction?
Question 16.
How will an organism be benefited if it reproduces through spores?
Question 17.
What is the importance of DNA copying in reproduction?
Question 18.
Which species is likely to have better chance of survival – the one reproducing asexually or the one reproducing sexually? Justify your answer.
Question 19.
Why is variation beneficial to the species but not necessarily for the individual?
Question 20.
Explain the process of regeneration in Planaria? How is his process different from reproduction?
Question 21.
What is AIDS? Which microbe is responsible for AIDS infection? State one mode of transmission of this disease. Explain in brief one measure for the prevention of AIDS.

Question 21.
(a) Draw a diagram of human female reproductive system and label the part –
(i)that produce egg
(ii)where fusion of egg and sperm takes place.
(iii)where zygote is implanted
(b) What happen to human egg when it is not fertilized?
Question 22.
Answer the following:-
(i)Name any four asexual mode of reproduction?
(ii)Explain with diagram the method by which an Amoeba reproduces?
(iii)How is fission different from fragmentation?
Question 23.
What are the different methods of contraception?
Question 43.
(a) Write the name of those parts of a flower which serve the same function as the following do in animals –
(b) State the function of flower in the flowering part?
(c) Draw a labelled diagram of flower?

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Practice Question

Question 1 Which among the following is not a base?
B) $NH_4OH$
C) $C_2H_5OH$
Question 2 What is the minimum resistance which can be made using five resistors each of 1/2 Ohm?
A) 1/10 Ohm
B) 1/25 ohm
C) 10 ohm
D) 2 ohm
Question 3 Which of the following statement is incorrect? ?
A) For every hormone there is a gene
B) For production of every enzyme there is a gene
C) For every molecule of fat there is a gene
D) For every protein there is a gene

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