SCIENCE-10TH CBSE ANSWER KEY

HOW DO ORGANISMS REPRODUCE(11-16)
Question 11:If a woman is using a copper−T, will it help in protecting her from sexually transmitted diseases?
Answer: No. Using a copper-T will not provide a protection from sexually transmitted diseases, as it does not prevent the entry of semen. It only prevents the implantation of the embryo in the uterus.
Question 12:Asexual reproduction takes place through budding in
(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.
Answer: (b) Asexual reproduction takes place through budding in yeast.
Question 13:Which of the following is not a part of the female reproductive system in human beings?
(a) Ovary
(b) Uterus
(c) Vas deferens
(d) Fallopian tube
Answer: (c) Vas deferens is not a part of the female reproductive system in human beings.
Question 14:The anther contains
(a) sepals.
(b) ovules.
(c) carpel.
(d) pollen grains.
Answer: (d) The anther contains pollen grains.
Question 15:What are the advantages of sexual reproduction over asexual reproduction?
Answer: Advantages of sexual reproduction:
  • In sexual reproduction, more variations are produced. Thus, it ensures survival of species in a population.
  • The new formed individual has characteristics of both the parents.
  • Variations are more viable in sexual mode than in asexual one. This is because in asexual reproduction, DNA has to function inside the inherited cellular apparatus.
Question 16:What are the functions performed by the testis in human beings?
Answer: The testes are the male reproductive organs that are located outside the abdominal cavity within a pouch called scrotum.
Functions of testes:
  • Produce sperms
  • Produce a hormone called testosterone, which brings about secondary sexual characters in boys.

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