Category: Class 10 Science

CLASS X

Topic – Reproduction

Time: 25 Min                                                                                                                              Marks: 20

1. Reproduction is essential for living organisms in order to
   (a) keep the individual organism alive
   (b) fulfill their energy requirement
   (c) maintain growth
   (d) continue the species generation after generation 

2. During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys
   (a) loss of milk teeth
   (b) increase in height
   (c) cracking of voice
   (d) weight gain

3. In human females, an event that reflects onset of reproductive phase is
   (a) growth of body
   (b) changes in hair pattern
   (c) change in voice
   (d) menstruation

   In males, the testes lie in the scrotum, because it helps in the
   (a) process of mating
   (b) formation of sperm
   (c) easy transfer of gametes
   (d) all the above

4. Which among the following is not the function of testes at puberty?
   (i) formation of germ cells
   (ii) secretion of testosterone
   (iii) development of placenta
   (iv) secretion of estrogen
   (a) (i) and (ii)
   (b) (ii) and (iii)
   (c) (iii) and (iv)
   (d) (i) and (iv)

5. The correct sequence of organs in the male reproductive system for transport of sperms is
   (a) testis → vas deferens → urethra
   (b) testis → ureter → urethra
   (c) testis → urethra → ureter
   (d) testis → vas deferens → ureter

6. Which among the following diseases is not sexually transmitted?
   (a) Syphillis
   (b) Hepatitis
   (c) HIV – AIDS
   (d) Gonorrhoea

Question Answers

1. Male individuals have 23 pairs of chromosomes, female individuals have 23 pairs of chromosomes. Then why doesn’t an offspring have 46 pairs of chromosomes which are obtained by the fusion of these two Gametes?

2. A group of class X students prepared a street play to educate masses on gender disparity to stop sex determination of girl child and abort it.

3. In human beings, what is the chance of giving birth to a girl child?

4. Who is responsible for the birth of a female child and why?

5. What value is depicted among the group members of class X?

6. Name two plants whose flowers are unisexual.

7. Give the full form of DNA.

8. Name two organisms that reproduce by budding.

9. What are the limitations of asexual mode of reproduction?

10. What is the principle of the Surgical method?

11. Explain the interlink of biotic and abiotic factors in any ecosystem.

12. Why does the amount of toxic chemicals keep on increasing in the food chain when we move from left to right?