Class 12BiologySexual Reproduction in Flowering PlantsMix Examples-Sexual Reproduction in Flowering Plants
MediumGive differences: Microsporogenesis and Megasporogenesis.
(N/A)
| Microsporogenesis | Megasporogenesis |
|---|---|
| $1$. This process occurs in the anther. | $1$. This process occurs in the ovule (within the ovary). |
| $2$. Meiotic division of the pollen mother cell $(PMC)$ forms a microspore tetrad. | $2$. Meiotic division of the megaspore mother cell $(MMC)$ forms a megaspore tetrad. |
| $3$. Four functional microspores are usually produced from a tetrad. | $3$. Usually,only one functional megaspore is produced; the other three degenerate. |
| $4$. It leads to the formation of male gametophytes (pollen grains). | $4$. It leads to the formation of the female gametophyte (embryo sac). |
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Similar Questions
If the diploid number of an angiospermic plant is $24$,the number of chromosomes in the pollen grain,endosperm,and integument will be:
Medium
View SolutionWhich of the following statements is $NOT$ correct?
Medium
View SolutionStudy the following statements and select the correct option:
$(i)$ Tapetum nourishes the developing pollen grains.
$(ii)$ Hilum represents the junction between the ovule and the funicle.
$(iii)$ In aquatic plants such as Water hyacinth and Water lily,pollination occurs by water.
$(iv)$ The primary endosperm nucleus is haploid.
$(i)$ Tapetum nourishes the developing pollen grains.
$(ii)$ Hilum represents the junction between the ovule and the funicle.
$(iii)$ In aquatic plants such as Water hyacinth and Water lily,pollination occurs by water.
$(iv)$ The primary endosperm nucleus is haploid.
Medium
View SolutionFor the formation of $140$ angiospermic seeds,how many meiotic cell divisions are expected?
Statement $X$: In gymnosperms,the endosperm is formed before fertilization.
Statement $Y$: In angiosperms,double fertilization is observed.
Statement $Y$: In angiosperms,double fertilization is observed.
Medium
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