Explain giving one example of each, the unisexual and the bisexual flowers.
Explain giving one example of each, the unisexual and the bisexual flowers.
1. Unisexual Flower:
- Explanation: A flower that contains either stamens (male reproductive part) or pistil (female reproductive part), but not both.
- Example: Papaya, Watermelon.
2. Bisexual Flower:
- Explanation: A flower that contains both stamens and pistil (both male and female reproductive parts) within the same flower.
Example: Hibiscus*, Mustard.
Marking Scheme
- 1Correct definition and example of a unisexual flower. (1 mark)
- 2Correct definition and example of a bisexual flower. (1 mark)
Hint
Recall which flowers contain only one reproductive part (male or female) and which contain both stamens and pistil together.
Quick Oral Answer
A unisexual flower has only stamens or only pistil, like papaya. A bisexual flower contains both stamens and pistil in the same flower, like Hibiscus.
Analysis & Explanation
Flowers are the reproductive structures of angiosperms. Based on the presence of reproductive organs, they are classified into unisexual and bisexual. Stamens produce pollen grains containing male germ-cells, while the pistil contains the ovary with egg cells (female gametes). Unisexual flowers rely entirely on cross-pollination to achieve fertilisation, whereas bisexual flowers can undergo either self-pollination or cross-pollination.
Common Mistakes
- 1Confusing the examples (e.g., writing Hibiscus as unisexual and papaya as bisexual).
- 2Defining unisexual flowers as having 'no reproductive parts' instead of 'either stamens or pistil'.
Interesting Facts
Bisexual flowers are also known as 'hermaphrodite' or 'perfect' flowers because they carry both male and female reproductive systems in a single blossom.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2011?
This question carries 2 marks in the CBSE Class 10 Science 2011 examination.
Which chapter does this question come from in Science?
This question is from the chapter "How do Organisms Reproduce?" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Sexual Reproduction in Flowering Plants" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2011 paper?
This is a Short Answer question from Section A in the CBSE Class 10 Science 2011 paper.