Class XII Biology: Pollination Methods and Plant Examples
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Questions and Answers

Which of the following birds aid in pollination?

  • Parrot
  • Crow
  • Sunbirds (correct)
  • Bulbul

    • What type of flowers are typically pollinated by bats?

  • Large white flowers
  • Dull-colored flowers with a strong aroma (correct)
  • Small, colorful flowers
  • Fragrant flowers with minimal nectar

    • Which animals are responsible for pollinating Arisaema plants?

  • Ants
  • Bees
  • Snails (correct)
  • Bats

    • What is the significance of pollination?

    <p>Required for fertilization and seed production</p> Signup and view all the answers

    Which of the following is a characteristic of hydrophily?

    <p>Pollination by water</p> Signup and view all the answers

    What is anemophily?

    <p>Pollination by wind</p> Signup and view all the answers

    Which flowers are anemophilous?

    <p>Small, inconspicuous flowers</p> Signup and view all the answers

    'Malacophily' refers to pollination by which organism?

    <p>Snails</p> Signup and view all the answers

    Where does fertilization take place in the female reproductive system?

    <p>Fallopian tube</p> Signup and view all the answers

    What is the role of the sperm's acrosome during fertilization?

    <p>Blocking entry of other sperms</p> Signup and view all the answers

    What is the result of the fusion between the haploid male gamete and the haploid female gamete?

    <p>Production of a diploid zygote</p> Signup and view all the answers

    What ensures that only one sperm can fertilize a single ovum?

    <p>Secretions of the acrosome</p> Signup and view all the answers

    Which part of the female reproductive system releases the ovum during ovulation?

    <p>Ovary</p> Signup and view all the answers

    What determines the sex of the fetus?

    <p>Sex chromosome in the sperm</p> Signup and view all the answers

    What is the chromosome count in a primary spermatocyte?

    <p>46</p> Signup and view all the answers

    Which cells are embedded in Sertoli cells during spermiogenesis?

    <p>Spermatids</p> Signup and view all the answers

    What is the chromosome count in a spermatozoon (spermatozoa)?

    <p>23</p> Signup and view all the answers

    Which process involves the maturation of spermatids into spermatozoa?

    <p>Spermiogenesis</p> Signup and view all the answers

    How many chromosomes do spermatids contain?

    <p>23</p> Signup and view all the answers

    What is the role of spermiation in spermatogenesis?

    <p>Release of sperms from seminiferous tubules</p> Signup and view all the answers

    Where does Follicle Stimulating Hormone (FSH) act in males?

    <p>On Sertoli cells</p> Signup and view all the answers

    What is the main role of Luteinizing Hormone (LH) in males?

    <p>Stimulating androgen synthesis in Leydig cells</p> Signup and view all the answers

    Which part of the sperm contains enzymes that aid in fertilization?

    <p>Head</p> Signup and view all the answers

    What provides energy for the vigorous motility of the sperm?

    <p>Middle piece of the sperm</p> Signup and view all the answers

    Approximately how many sperms are released during ejaculation?

    <p>200-300 million</p> Signup and view all the answers

    What is the composition of semen?

    <p>Milky white organic liquid</p> Signup and view all the answers

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