12. With reference to the diagram given below With the type of fertilization and development
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A shows a pollen grain which is germinating as pollen tube is emerging from it.
B shows stigma which is the part of flower on which pollen grain germinates.
C shows style which is the part of flower through which pollen tube travels and reaches the ovary.
D shows embryo sac which is a 7-celled 8-nucleate structure consisting of synergids, antipodal cells, egg cell and central cell (two polar nuclei).
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Fertilization- External
Development -The life cycle of a frog consists of three stages: egg, larva, and adult. As the frog grows, it moves through these stages in a process known as metamorphosis
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