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Plants are the primary producers in most terrestrial ecosystems and form the basis of the food web in those ecosystems. Plants form about 80% of the world biomass at about 450 gigatonnes (4.4 × 10 11 long tons; 5.0 × 10 11 short tons) of carbon. Ecological relationships
- Plantae
No moderno contexto taxonómico, em geral apenas é designado...
- Flowering plant
Flowering plants are plants that bear flowers and fruits,...
- Plantae
- Types of Plants
- The Plant Food Factory
- Roots
- Flowering Plant Reproduction
- Fossils
- Related Pages
Green algae: 1. Chlorophyta 2. Charophyta Land plants (embryophyte) 1. Non-vascular plants (bryophytes): 1.1. Liverworts 1.2. Mosses 1.3. Hornworts 1.4. †Horneophytopsida 2. Vascular plants (tracheophytes) 2.1. Lycopodiophyta—clubmosses 2.2. Pteridophyta: the ferns 2.2.1. Pteridopsida: the typical ferns 2.2.2. Sphenopsida: the horsetails 2.2.3. Mar...
At least some plant cells contain photosynthetic organelles (plastids) which enable them to make food for themselves. With sunlight, water, and carbon dioxide, the plastids make sugars, the basic molecules needed by the plant. Free oxygen (O2) is produced as a by-product of photosynthesis. Later, in the cell cytoplasm, the sugars may be turned into...
The roots of plants perform two main functions. First, they anchor the plant to the ground. Second, they absorb water and various nutrients dissolved in water from the soil. Plants use the water to make food. The water also provides the plant with support. Plants that lack water become very limp and their stems cannot support their leaves. Plants w...
Flowers and pollination
Flowers are the reproductive organ only of flowering plants (Angiosperms). The petals of a flower are often brightly colored and scented to attract insects and other pollinators. The stamen is the male part of the plant. It is composed of the filament (a stalk) that holds the anther, which produces the pollen. Pollen is needed for plants to produce seeds. The carpel is the female part of the flower. The top part of the carpel contains the stigma. The style is the neck of the carpel. The ovary...
Seed travelers
A plant produces many spores or seeds. Lower plants such as moss and ferns produce spores. The seed plants are the Gymnospermsand Angiosperms. If all the seeds fell to the ground besides the plant, the area might become overcrowded. There might not be enough water and minerals for all the seeds. Seeds usually have some way to get to new places. Some seeds can be dispersed by the wind or by water. Seeds inside juicy fruits are dispersed after being eaten. Sometimes, seeds stick to animals and...
The question of the earliest plant fossils depends on what is meant by the word "plant". 1. If by plants we mean phototrophs using chlorophyll, then cyanobacteria in stromatolites are the first fossils, 3,450 million years ago (mya) in the Archaean eon. The remarkable precision is possible because the fossils were sandwiched between lava flows that...
- Plantae, sensu Copeland, 1956
A evolução das plantas ocorreu através de níveis de complexidade sucessivamente mais complexos, desde os primitivos tapetes de algas, passando pelos briófitos, licópodes, fetos (samambaias) e gimnospérmicas, até às complexas angiospérmicas da actualidade. Apesar das plantas mais simples continuarem a prosperar, em especial em ...
Páginas na categoria "Géneros de plantas". (página anterior) ( página seguinte) (página anterior) ( página seguinte ) Categorias: Gêneros biológicos. Grupos taxonómicos de plantas.
categoria. O Commons possui uma categoria com imagens e outros ficheiros sobre Plantas. Categorias: Agricultura. Botânica. Eucariontes. Categoria oculta:
