jueves, 31 de mayo de 2012

LAS PARTES DE UNA PLANTA









The flowers are a part of the plants. Plants are living beings vivos.Los are 6 vital functions: They are born, grow (just to reach the adult stage), They eat, breathe, reproduce and adapt to the environment in which they live (are related).

But besides these 6 vital functions all living beings have another feature in common: All are made of cells, either unicellular (consist of a single cell) or multicellular (made ​​up of a cell +). This is what tells the Cell Theory


















domingo, 20 de mayo de 2012


Áreas: COÑECEMENTO DO MEDIO. INGLÉS
Nivel: 3º de PRIMARIA
Os contidos desta unidade serán: 
  • Os nomes dalgunhas flores.
  • Partes da flor.
  • Como se reproducen.
  • Clases de flores.
  • Función da flor.



The Basic Flower Parts
The flower consists of many different parts. Some of the most important parts being separated into both male and female parts. 
 
Male Parts
  • Stamen
    This is the male part of the flower. It is made up of the filament and anther, it is the pollen producing part of the plant. The number of stamen is usually the same as the number of petals.
  • Anther
    This is the part of the stamen that produces and contains pollen. It is usually on top of a long stalk that looks like a fine hair.
  • Filament
    This is the fine hair-like stalk that the anther sits on top of.
Female Parts

  • Pistil
    This is the female part of the flower. It is made up of the stigma, style, and ovary. Each pistil is constructed of one to many rolled leaflike structures.
  • Stigma
    One of the female parts of the flower. It is the sticky bulb that you see in the center of the flowers, it is the part of the pistil of a flower which receives the pollen grains and on which they germinate.
  • Style
    Another female part of the flower. This is the long stalk that the stigma sits on top of.
  • Ovary
    The part of the plant, usually at the bottom of the flower, that has the seeds inside and turns into the fruit that we eat. The ovary contains ovules.
  • Ovule
    The part of the ovary that becomes the seeds.
Other Important Parts of a Flower
  • Petal
    The colorful, often bright part of the flower. They attract pollinators and are usually the reason why we buy and enjoy flowers.
  • Sepal
    The parts that look like little green leaves that cover the outside of a flower bud to protect the flower before it opens.
Flower Types
  • Imperfect Flower
    A flower that has either all male parts or all female parts, but not both in the same flower. Examples: cucumbers, pumpkin, and melons.
  • Perfect Flower
    A flower that has both the male parts and female parts in the same flower. Examples: roses, lilies, and dandelion.

viernes, 18 de mayo de 2012


Structure and function of flowers

The male gametes in flowers are the pollen, while ovules are the female gametes. Pollen from one plant fertilizes the ovules of another plant through flowers, in the cross-fertilisation method of reproduction.
A flower's male parts are the Stamens and female parts are the carpels. Though, most plants produce flowers that have both male and female reproductive parts, separate male and female flowers bloom in some plants.
Study the parts of a simple flower with reference to the location and function of the parts given in the following details.
 

Sepals
Generally green colored exterior protective coverings of a flower.
Petals
Mostly colored to attract pollinating insects and are framed by sepals.
Nectar
The sweet liquid at the base of petals that attracts insects.
Stamens 
 
Pollen producing male organs that include the anther and supporting filament.
Carpels
Female organs that produce ovules inside the ovary, which is attached to the style and stigma.

Flower Biology


Flowering occurs in plants with particular climatic changes such as sunny, cold, dry or drought conditions. In conducive growing conditions plant size and foliage increase, but many flowers are not produced.
Flowers are the reproductive organs of a plant. Sexual reproduction in plants is enabled by flowering and is a sign of plant survival. Some plants do not require reproduction by flowering but reproduce by sending out runners eg., strawberry, and form identical plants. This form of propagation is termed asexual reproduction.
Did you know? Sepals and petals are the sterile parts of flowers. When these are similar in size and shape, they are termed 'Tepals'.