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Uttarakhand Board Class 10 How do Organisms Reproduce — practice questions

Explore 28 free How do Organisms Reproduce questions in Uttarakhand Board Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

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How do Organisms Reproduce questions and exercises with answers

Showing questions 1–28 of 28.

Which of the following is the basic event of reproduction at the cellular level?Read the answer and worked solution →Which unicellular organism reproduces by binary fission in any plane?Read the answer and worked solution →Which organism reproduces by multiple fission?Read the answer and worked solution →Spirogyra reproduces by which method?Read the answer and worked solution →The ability of Hydra and Planaria to grow into a full organism from a body piece is called:Read the answer and worked solution →In Hydra, reproduction by an outgrowth of cells at one side of the body is called:Read the answer and worked solution →Which structure on the leaf of Bryophyllum gives rise to new plants?Read the answer and worked solution →In tissue culture, cells from the growing tip of a plant first multiply into a:Read the answer and worked solution →In Rhizopus, the structures that produce spores are called:Read the answer and worked solution →A clear advantage of vegetative propagation is that the new plants:Read the answer and worked solution →The male reproductive part of a flower is the:Read the answer and worked solution →Pollen grains are produced inside the:Read the answer and worked solution →The transfer of pollen from anther to stigma is called:Read the answer and worked solution →Self-pollination occurs when pollen is transferred:Read the answer and worked solution →Fertilisation in flowering plants occurs in the:Read the answer and worked solution →After fertilisation, the ovule develops into the:Read the answer and worked solution →The structure that produces sperm in the human male is the:Read the answer and worked solution →The hormone that triggers the changes of puberty in human females is mainly:Read the answer and worked solution →In humans, fertilisation normally takes place in the:Read the answer and worked solution →The menstrual cycle of a normal human female lasts approximately how many days?Read the answer and worked solution →A barrier method of contraception is the:Read the answer and worked solution →Hormonal contraceptive pills act primarily by:Read the answer and worked solution →Which of the following is a sexually transmitted bacterial disease?Read the answer and worked solution →In an angiosperm, the haploid cell that fuses with the egg to form the zygote is the:Read the answer and worked solution →Pollination by wind tends to produce flowers that are:Read the answer and worked solution →Fission divides the parent cell into two equal halves, whereas multiple fission divides it into:Read the answer and worked solution →Which of the following is NOT a method of contraception?Read the answer and worked solution →A flower that has both stamens and pistils is called:Read the answer and worked solution →

Worked practice questions

Which of the following is the basic event of reproduction at the cellular level?

  1. Creation of a DNA copy
  2. Cell membrane fusion
  3. Mitochondrial division
  4. Lysosome breakdown
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Correct answer: A. Creation of a DNA copy

1. Reproduction at its most basic level involves creating copies of the body design blueprint. 2. DNA in the cell nucleus carries the information for body design. 3. The basic event therefore is the creation of a DNA copy that is then partitioned during cell division. _Source: syllabus Science, Ch 7 "How do Organisms Reproduce", §7.1_

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Which unicellular organism reproduces by binary fission in any plane?

  1. Leishmania
  2. Amoeba
  3. Plasmodium
  4. Yeast
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Correct answer: B. Amoeba

1. Amoeba lacks any fixed orientation of its body. 2. Its binary fission therefore proceeds along any random plane. 3. Leishmania (definite plane), Plasmodium (multiple fission), and Yeast (budding) follow different patterns. _Source: syllabus Science, Ch 7 "How do Organisms Reproduce", §7.2.1_

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Which organism reproduces by multiple fission?

  1. Hydra
  2. Amoeba
  3. Plasmodium
  4. Spirogyra
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Correct answer: C. Plasmodium

1. Plasmodium, the malarial parasite, divides into many daughter cells at once. 2. This pattern is called multiple fission. 3. Amoeba uses binary fission; Hydra buds; Spirogyra fragments. _Source: syllabus Science, Ch 7 "How do Organisms Reproduce", §7.2.1_

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