ALL ABOUT PLANTS.
What are plants? Plants are living things. They are made up of cells. They need air, water, soil, and sunlight to live. They cannot move from place to place, but their leaves move to catch the sun and their roots move to get water. Their seeds can be carried by animals or blown by the wind.
Part of the plants • Roots. Take in water and food from soil. The rots anchor plants to the soil. • Stem. transports water through plant. The stem raises the height of flowers and leaves ant take then closer to light. The stem is made up of little tubes.
Leaves. Almost always green but sometimes covered with another colour such as red. Leaves make food for the plant. To do this they need the water and mineral salts obtained from the soil, sunshine and CO2. • Flowers . Flowers produce seeds which form new plants.
How plants make food: photosynthesis Plants makes their own food. Leaves are the most important part of the plant for this process. Within the leaf is a green material called chlorophyll. Chlorophyll absorbs sunlight to make a natural sugar that the plants uses for food. This process is called photosynthesis.
During photosynthesis, plants use light energy from the sun to convert carbon dioxide from the air and water from the soil into sugar to feed the plant. During this process oxygen is released into the air. Because of that plants are very important since they clean the air. The leaf has veins for carrying the sugar to other parts of the plant. In the fall, leaves lose their chlorophyll, so that they change to different colours. http://tpssharonh.blogspot.com.es/201 2/08/photosynthesis.html
Plants classification We are going to study two types of plants, the one that has got flowers and the one that hasn’t got flowers, 4.1 Flowering plants are a type of vascular plant that produces flowers in order to reproduce. Flowering plants produce seeds within a fruit. The scientific name for flowering plants is angiosperms.
Flowering plants reproduction Flowers are important for sexual reproduction by plants. They produce male sex cells and female sex cells. They attract the insects thanks to their colours and smell. By means of pollination both cells female and male meet together.
Part of the flowers
Sepals: Protect the unopened flower. Petals: May be brightly coloured to attract insects Stamens: The male parts of the flower (each consists of an anther held up on a filament) Anthers: Produce male sex cells (pollen grains) Stigma: The top of the female part of the flower which collects pollen grains Style: Long tube que connect the stigma with the ovary. Ovary: Produces the female sex cells (contained in the ovules) The anther and the filament form the stamen The stigma, the style and the ovary form the Pistil
Plants Reproduction Reproduction in flowering plants begins with pollination. Pollination is the transfer of pollen from anther to stigma on the same flower or to the stigma of another flower. The pollination can be made for the insects or for the wind. When the pollen joins with the female egg cell, fertilisation has taken place. After this, the petals fell and the seeds grow in the ovary.
Why plants are so important? Plants are very important for us because: • They give us food from all different parts of the plant: flowers, fruits, vegetables, seeds, nuts, stems, and leaves. • Some plants give us medicine. • Trees are used to make paper and furniture. • They clean the air as they take carbon dioxide which is bad for us and expel oxygen which is good for us. • Plants provide habitat for animals and humans. • Plants protect the soil from erosion