Differentiate between the following.
i) Bisexual and unisexual flower
ii) Diadelphous and polyadelphous condition
iii) Autogamy and geitonogamy
iv) Protandry and protogyny
v) Tube nucleus and generative nucleus

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Solution

BISEXUAL FLOWER
1) Male and female reproductive parts are present in the same flower. Single flower has both anther and ovary.
2) They are called an androgynous flower.
3) Complete flower.
4) Eg- Rose, lily. UNISEXUAL FLOWER
1) Male and female reproductive parts are present in separate flowers. Male flower has stamens, female flowers have pistils.
2) They are monoecious or dioecious.
3) Incomplete flower.
4) Eg- Papaya, watermelon.
DIADELPHOUS
1) Stamens are fused together partly by filaments to form 2 separate bundles.
2) Eg- Hibiscus. POLYADELPHOUS
1) Stamens having united filaments, so they are arranged in groups of 3 or more.
2) Eg- Pea, citrus.
AUTOGAMY
1) Deposition of pollen grains on the stigma of the same flower.
2) shows self- pollination.
3) Eg- sunflower, pea. GEITNOGAMY
1) Deposition of pollen grains on another flower of the same plant.
2) Functionally it shows cross-pollination.
3) Eg- corn.
PROTANDRY
1) It is a state in hermaphrodites characterised by the maturation of male part before female ones and inhibits self- fertilization. Eg- ivy and rosebay willowherb PROTOGYNY
1) female part i.e pistils mature before male ones.
2) Eg- wheat, barley.
TUBE NUCLEUS
1) One of the two nuclei formed by the mitotic division of microspore (haploid) during pollen formation.
2) It controls the growth of pollen grains GENERATIVE NUCLEUS
1) One of the two nuclei resulting from the 1st division in pollen grains that give rise to sperm nuclei.
2) It helps in fertilization.

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BISEXUAL FLOWER 1) Male and female reproductive parts are present in the same flower. Single flower has both anther and ovary. 2) They are called an androgynous flower. 3) Complete flower. 4) Eg- Rose, lily.	UNISEXUAL FLOWER 1) Male and female reproductive parts are present in separate flowers. Male flower has stamens, female flowers have pistils. 2) They are monoecious or dioecious. 3) Incomplete flower. 4) Eg- Papaya, watermelon.
DIADELPHOUS 1) Stamens are fused together partly by filaments to form 2 separate bundles. 2) Eg- Hibiscus.	POLYADELPHOUS 1) Stamens having united filaments, so they are arranged in groups of 3 or more. 2) Eg- Pea, citrus.
AUTOGAMY 1) Deposition of pollen grains on the stigma of the same flower. 2) shows self- pollination. 3) Eg- sunflower, pea.	GEITNOGAMY 1) Deposition of pollen grains on another flower of the same plant. 2) Functionally it shows cross-pollination. 3) Eg- corn.
PROTANDRY 1) It is a state in hermaphrodites characterised by the maturation of male part before female ones and inhibits self- fertilization. Eg- ivy and rosebay willowherb	PROTOGYNY 1) female part i.e pistils mature before male ones. 2) Eg- wheat, barley.
TUBE NUCLEUS 1) One of the two nuclei formed by the mitotic division of microspore (haploid) during pollen formation. 2) It controls the growth of pollen grains	GENERATIVE NUCLEUS 1) One of the two nuclei resulting from the 1st division in pollen grains that give rise to sperm nuclei. 2) It helps in fertilization.