2. Questions Bank
  3. 10th Class
  4. Science
  5. How do Organisms Reproduce?

10th Class Science How do Organisms Reproduce? Question Bank Reproduction in Organisms

  • question_answer
    A student decides to study the impact of removing certain flower parts on fruit formation in plant species X. He chooses three separate plants that are growing in the same plot under uniform conditions. The data is given in the table below.
    Plants Part removed Impact on formation
    1 Another 30% less fruit formed than average plants in the plot
    2 Stigma No fruit formed
    3 Petal No significant impact
    Which of the following can be inferred from the above data?

    A) Anthers and stigmas are crucial in sexual reproduction in species X.

    B) Pollen grains are probably unable to germinate if they land on other parts of the carpel besides the stigma.

    C) Species X is likely to be wind-pollinated.

    D) Species X relies completely on cross- pollination.

    Correct Answer: D

    Solution :

    The removal of anthers affects fruit formation in plant 1, this implies that species X relies partially on self-pollination. The removal of either anthers or stigmas affects rate of fruit formation significantly. No fruits are observed when the stigmas in plant 2 are removed. This shows that pollen grains are probably unable to germinate if they land on any other part of the carpel besides the stigma. The petals do not seem to play a significant role in facilitating fruit formation. Species-X is therefore likely to be wind-pollinated with reduced petals.


You need to login to perform this action.
You will be redirected in 3 sec spinner