Question

List the changes observed in an angiosperm flower subsequent to pollination and fertilization.

Answer 1

Zygote develops into an embryo. 

(ii) Primary endosperm cell gives rise to endosperm. 

(iii) Integuments develop into seed coats. 

(iv) Ovary grows into a fruit having one or more seeds. 

(v) Some floral parts may fuse with fruit but mostly they wither and fall off.

Answer 2

HLO MATE HERE IS UR ANSWER

❤. POST - FERTILISATION EFFECTS ❤

⭐. The pollen grain germinate on the stigma to produce a pollen tube.

⭐. Pollen tube grows through the tissues of the stigma and style and reaches to the ovary.

⭐. Later pollen tube enters into the ovule by porogamy or chalazagamy or mesogamy .

⭐. After entering into the embryosac , the pollen tube brust and releases the two male gametes into the cytoplasm of the synergid .

⭐. The first male gamet fuses with egg and forms a diploid zygote .

⭐. The second male gamete fuses with the second nucleus and form PEN.

❤. POST - FERTILIZATION EFFECTS ❤

⭐. Calyx ,corolla ,stamens ,and stigma wither and drop away.

⭐. Fertilised ovary developes into fruit.

⭐. After fertilization ,ovules become seeds.

⭐. Zygote developes into embryo .

⭐. Antipodals degenerate .

⭐. Primary endosperm nucleus becomes endosperm.

⭐. Integuments become seed coats.

⭐. Micropyle of the ovule become micropyle of the seed.