Please enable JavaScript.
Coggle requires JavaScript to display documents.
Course Mind map, Flowers and Reproduction (Flower structure and cross…
-
Flowers and Reproduction
-
Asexual Reproduction
Fragmentatio n
in multicellular organisms is a form of asexual reproduction in which an organism is split into fragments. Each of these fragments develop into matured, fully grown individuals that are identical to their parents
Sexual Reproduction
It involves flowers, which produce the necessary cell and structures.
The plant life cycle
Diploid adults have sex organs that produce haploid sex cell gametes, either sperm or eggs, by meiosis.
-
-
-
Flower structure
-
-
Complete flowers have four types of appendages that are : sepals, petals, stamens and carpels.
Incomplete flower lack one or two of the four basic floral appendages.
Sepals
-
-
Stamens
Above the petals are stamens, collectively called androecium.
-
Carpels
-
has three parts
stigma
-
-
-
Gametophytes
Microgametophyte
-
-
Fertilization
Syngamy of sperm and egg involves both plasmogamy and the fusion of the protoplasts of the gametes and karyogamy.
-
both sperm nuclei undergo fusions one with the egg nucleus and the other with the polar nuclei- the process is called double fertilization.
-
Fruit development
As the ovule develops into a seed, the ovary matures into a fruit.
-
-
Inflorescences and Pollination
if many flowers are grouped together an inflorescence, they give a collective visual signal to pollinators.
-
-