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How do Organisms Reproduce Test - 28

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How do Organisms Reproduce Test - 28
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  • Question 1
    1 / -0
    Product of sexual reproduction generally generates: 
    Solution
    Sexual reproduction is the reproduction that is caused by the fusion of gametes. The male and female gametes fuse to form the zygote. Due to the fusion of gametes the product of sexual reproduction generally produces new genetic combinations leading to variations. The organism develops from the zygote which has the characters of both the parents. The genome of the offspring is formed by the recombination of genetic material so they are also known as recombinants.
    So, the correct answer is option D.
  • Question 2
    1 / -0
    Hydra reproduces by budding. This is an example of:
    Solution
    • Budding is a type of asexual reproduction which does not involve the fusion of gametes. 
    • A new organism develops from an outgrowth or bud due to cell division at one particular site. 
    • The bud remains attached to the parent plant and separates after it gets mature and grows into a new individual. Budding is seen in Hydra, yeast.
    • Thus, correct answer is option A. 
  • Question 3
    1 / -0
    Refer to the given figures and select the correct option.

  • Question 4
    1 / -0
    Read the following statements about reproduction and select the incorrect one:
    Solution
    • Reproduction is a biological process in which an organism gives rise to young ones. It is a fundamental feature of all known life. Reproduction enables the continuity of the species and produces genetic variations in organisms. 
    • Reproduction not only maintains populations of the young and adult persons but also that of older adults.
    • Reproduction is a key process that determines the distribution of people of various ages in a population, called age structure.
    • So the correct option is D.
  • Question 5
    1 / -0
    Which of the following means of birth control is most effective in preventing AIDS?
    Solution
    • Using condoms is the most effective means of birth control and to prevent diseases like AIDS. 
    • Condom is synthetic protection worn by the male or female partner on their sexual organs during sexual intercourse. 
    • It acts as a preventive barrier, and it prevents sperms to reach the egg, which in turn prevents fertilization. 
    • It is a kind of a contraceptive device that prevents pregnancy and the transmission of sexually transmitted diseases.

    So, the correct option is 'Condom'.
  • Question 6
    1 / -0
    Which of the following are incorrectly matched?
    (i) Vasectomy - Sterilization procedure in the female.
    (ii) Emergency contraceptive - Morning after pills.
    (iii) Copper - T - Inserted in the uterus that prevents Implantation of embryo.
    (iv) Oral pills - Inserted under the skin that slowly release progesterone which prevents implantation.
    (v) Diaphragm - A soft rubber cup that prevents sperms from entering uterus.
    Solution
    • Vasectomy is a surgical procedure for male sterilization.
    • The emergency contraceptive pill needs to be taken within 72 hours after unprotected sex. These pills are also known as morning after pills.
    • The copper IUD wrapped in thin copper wire that's toxic to sperm is inserted into the uterus of female.It keeps fertilized egg from implanting in the uterus.
    • Oral pills are contraceptive pills that need to be taken orally.
    • A diaphragm is a rubber cap used as a barrier method of contraception by females during sexual intercourse. 

    So the correct answer is option B.
  • Question 7
    1 / -0
    Saffron is obtained from which part of plants?
    Solution
    Saffron is obtained from the red tips of the stigmas and is the world's most expensive spice. Saffron is harvested from the Crocus sativus. The plant grows best in well-drained soil that is moderately rich in organic matter.
    So the correct answer is option D.
  • Question 8
    1 / -0
    The following chart depicts the fertilization between males and females during sexual production.
    Which is true for P, Q, R, S from the following?
    PQRS
    (1)OvaryTestisEggSperm
    (2)TestisOvarySpermEgg
    (3)UterusPenisEggSperm
    (4)PenisUterusSpermEgg

    Solution
    Sequence - 2 is correct according to P, Q, R, S in the diagram. 
    In the diagram, P says male reproductive organ, which is Testis. 
    Q is female reproductive organ, which is Ovary.
    R is a Male gamete, which is Sperm.
    S is a female gamete, which is Egg. 
    Thus, sequence 2 is correct. 
  • Question 9
    1 / -0
    For living organisms reproduction is essential:  
    (P) For satisfying their energy requirements.
    (Q) For the survival of their species.
    (R) For continuity of life
    (S) To keep the organs of the animal alive
    Solution
    Reproduction is a fundamental characteristic of all living organisms. It is the process by which living organisms produce offspring similar to them. It is essential for the survival of the species. It makes things safe against the continuity of life on the Earth. It is essential to ensure that they do not get extinct. 
    Thus, the correct answer is 'Statement Q and R are true.'
  • Question 10
    1 / -0
    What is the common method of propagation in $$Bryophyllum$$ ?
    Solution
    • In vegetative propagation, any part of the plant, i.e., stem, root, leaf, or even buds are capable to give rise to new plants. 
    • Vegetative propagation through leaves is the common method of propagation seen in $$Bryophyllum$$. 
    • If one keeps a leaf of $$Bryophyllum$$ on damp soil, within a day or two the buds appear on the margin of the leaf. These buds would later form new plants, complete with roots, leaves, and stem.

    So, the correct answer is option A.
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