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Flower organs have evolved from modified...

Flower organs have evolved from modified

A

Leaves

B

Branches

C

Sporangia

D

Apical meristems

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Flower Organs**: - Flower organs consist of four main parts: sepals, petals, stamens (androecium), and pistils (gynoecium). 2. **Identifying the Options**: - The options provided are: - A) Leaves - B) Branches - C) Sporangia - D) Apical Meristems 3. **Analyzing Each Option**: - **Option A: Leaves**: Flower organs are known to have evolved from modified leaves. This is the correct answer. - **Option B: Branches**: Flower organs do not evolve from modified branches. This option is incorrect. - **Option C: Sporangia**: Sporangia contain spores, which are not part of flower organ structure. This option is also incorrect. - **Option D: Apical Meristems**: Apical meristems are regions of growth found at the tips of roots and shoots, and they do not form flower organs. This option is incorrect as well. 4. **Conclusion**: - Based on the analysis, the correct answer is that flower organs have evolved from modified **leaves**. **Final Answer**: A) Leaves ---
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AAKASH SERIES-SEXUAL REPRODUCTION IN FLOWERING PLANTS -EXERCISE - I (Introduction, Microsporophyll, Anther, Male gametophyte)
  1. Flower organs have evolved from modified

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  2. A typical anther of an angiosperm is

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  3. Male gametes are formed by

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  4. How many nuclei are present in a mature pollen?

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  5. The intine of a pollen grain is mainly made up of

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  6. The exine of a pollen grain is composed of one of the most resistant ...

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  7. Sculpturing of exine of pollen is important in

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  8. Male gametes in angiosperms are formed by the division of

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  9. In flowering plants, mature male gametophyte is derived from a polle...

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  10. In a flowering plant 2n = 24, the number of chromosomes in its endospe...

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  11. Pollen grains are shed at

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  12. Fusion of male gamete with polar nuclei of embryo sac is known as

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  13. Tapetum occurs in

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  14. Which one of the following statements is correct?

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  15. Exine of pollen grain is made up of

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  16. Pollen tablets are available in the market for

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  17. Which of the following statements about sporopollenin is incorrect ?

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  18. In angiosperms how many male gametes are produced by one meiosis in on...

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  19. Male gametes in angiosperms are formed by the division of

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  20. If there are 40 pollen mother cells in anther, what will be the number...

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