Most plants have five main parts: leaves, stems, roots, flowers, and fruit. http://www.agrinfobank.com
Leaves. http://www.agrinfobank.com
Leaves. http://www.agrinfobank.com
Leaves make sugars by a process called photosynthesis (photo = light, synthesis = putting together). This process takes place in green structures within the leaves called chloroplasts. Chloroplasts give plants their green color. No sugars can be made in the chloroplasts unless water, carbon dioxide, and light are all present. Leaves are arranged on the plant to "catch" as much light as possible. Leaves have tiny pores, called stomata, which let in car -bon dioxide from the air. As the carbon di ox ide comes in, water (in the form of a gas) escapes. This escape of water from the plant is called transpiration. The plant can slow down the loss of water by closing its stomata.
Flowers.
Flowers are often pretty, but their main purpose is to produce seed. Their colors and markings are designed to attract in sects. The ovule will be come a seed when it is fertilized by pollen. Some flowers can be fertilized by their own pollen (self-pollinating). Others require pollen from different flowers (cross-pollinating). Insects are often the agents for transferring pollen from one flower to an other. agrinfobank.com
Some plants have different types of flowers on the same plant. For example, a cucumber plant has male flowers (flowers with no female parts) and female (flowers with no male parts). Such plants are called monoecious. agrinfobank.com
Other plants are called dioecious be cause each plant will have only one type of flower. A male plant will pro duce only male flowers, and a female plant will produce only female flowers. An example of a dioecious plant is holly. Male plants will not have red berries, and neither will female plants un less male plants are nearby to pollinate their flowers.
Fruits. http://www.agrinfobank.com
Fruits can take many forms and shapes, but they have only one common purpose. They are de signed to scatter the seed inside them. http://www.agrinfobank.com
Stem. http://www.agrinfobank.com
The stem sup ports the leaves so that they are in the light. It sup ports the flowers and fruits in a position to ensure pollination and seed dispersal. The stem also contains the transportation system. Sugars move from the leaves to the roots through the stem, and at the same time water and nutrients move from the roots to other parts of the plant.
Roots.http://www.agrinfobank.com
Roots are tiny, branching string-like structures that grow down into the soil, taking up water and nutrients. They also steady the plant so it can position its leaves to catch light. http://www.agrinfobank.com
Seed. http://www.agrinfobank.comhttp://www.agrinfobank.com
Many plants begin life as a seed. When conditions are right, the seed will germinate and be come a seedling. Young plants have only leaves, roots, and a stem.
A plant is considered an adult when it flowers. When it forms seeds, the life cycle is complete. Many plants die immediately after forming seeds.
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