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Flowers and reproduction - Coggle Diagram
Flowers and reproduction
Asexual reproduction
A large spreading or vining plant grows to several meters in length, and individual parts become self-sufficient by establishing adventitious roots. If the middle portions of the plant die, the ends become separated and act as individuals
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Sexual reproduction
The plant life cycle
Sporophyte phase
A diploid (having two sets of chromosomes) plant body grows and eventually produces spores through meiosis. These spores divide mitotically to produce haploid (having a single set of chromosomes) gamete-producing bodies called gametophytes.
The function of the sporophyte is to create spores, The spores, in turn, produce the gametophytes that give rise to the male and female gametes through the process of meiosis. Meiosis is the type of cell division that reduces the number of chromosomes in half.
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Megagametes
The larger, immobile gamete ( does not swim to egg)
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Flower structure
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Receptacpe
vegetative tissues near the end of reproductive stems that are situated below or encase the reproductive organs.
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Incomplete flowers
a flower missing any of its parts in its natural form,. petals, sepals, stamens or pistils
Calyx
The sepals of a flower, typically forming a whorl that encloses the petals and forms a protective layer around a flower in bud.
Corolla
the petals of a flower, typically forming a whorl within the sepals and enclosing the reproductive organs.
Perianth
the outer part of a flower, consisting of the calyx (sepals) and corolla (petals).
Stamens
the male fertilizing organ of a flower, typically consisting of a pollen-containing anther and a filament.
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Gametophytes
Microspores develop into microgametophytes, each microgametophyte is very simple and small consisting of at most three cells located within the original pollen cell wall
Fertilization
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Karyogamy
is the final step in the process of fusing together two haploid eukaryotic cells, and refers specifically to the fusion of the two nuclei
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double fertilization
the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes The pollen tube proceeds to release the two sperm in the megagametophyte
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suspensor
cellular structure, developed along with the embryo in seed-bearing plants, that bears the embryo at its apex and by elongation carries the embryo to its food source.
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Fruit development
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mesocarp
is the fleshy middle layer of the pericarp of a fruit; it is found between the epicarp and the endocarp
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Pericart
the tissue that develops from the ovary wall of the flower and surrounds the seed to protect it in environments apart from the parent plant.
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Sexual reproduction in angiosperms involves flowers, which produce the necessary cells and structures.
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