230 likes | 337 Views
HOW PLANTS GROW. TWO PHASES IN THE LIFE CYCLE OF A PLANT. VEGETATIVE STAGE- includes the growth of roots, stems, and leaves . REPRODUCTIVE STAGE- t he development of flowers, fruits and seeds take place . THREE ESSENTIAL CONDITIONS FOR GERMINATION.
E N D
VEGETATIVE STAGE- includes the growth of roots, stems, and leaves.
REPRODUCTIVE • STAGE- • the development of flowers, fruits and seeds take place.
1.Amount of moisture - which is needed to soften the seed coat and to help in the circulation of food which the seed contains.
2.Oxygen -which when moisture is absorbed, oxygen takes in andcarbon dioxide is given off by the seed.
3.Warmth and air in the soil - needed to germinate seeds like melon, corn beans, cucumber and tomatoes that’s why they are planted at the onset of dry season.
C O R N B E A N S
T O M A T O E S
THE REPRODUCTIVE STAGE
A new stage in a plant life that begins production of flowers and ends with maturing of seeds. It is made up of organs like sepals, stamens, pistils, and petals.
Hypocotyls - the part of the embryo that first grows downward into the soil forms the stem of the seedling Epicotyls - the young leaves of the new plant
Development of a seed epicotyl hypocotyl embryo seed
Pistils – are the female part of the flower which consists of an ovary with an upright extension.
Stamens– compose the male parts of the flower, each of which consists of a supporting filament and an anther where the pollen grain is produced.
Stigma- which lies on top of the style serves as the pollen-receptive surface.
Pollination- a process in which fertilization takes place when a male nucleus in the pollen tube unites with the female nucleus of the ovule.
petals stigma stigma filament sepal sepals