安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Photosynthesis | Definition, Formula, Process, Diagram, Reactants . . .
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds
- Chloroplast | Diagram, Function, Structure, Location, Importance . . .
A chloroplast is a structure within the cells of plants and green algae that is the site of photosynthesis Chloroplasts are a type of plastid that are distinguished by their green color, the result of specialized chlorophyll pigments In plants chloroplasts occur in all green tissues
- photosynthesis - Kids | Britannica Kids | Homework Help
Photosynthesis is the process in which green plants use sunlight to make their own food Photosynthesis is necessary for life on Earth Without it there would be no green plants, and without green plants there would be no animals Photosynthesis requires sunlight, chlorophyll, water, and carbon dioxide gas Chlorophyll is a substance in all green plants, especially in the leaves Plants take
- Carbon cycle | Definition, Steps, Importance, Diagram, Facts - Britannica
Carbon cycle, in biology, circulation of carbon in various forms through nature Carbon is a constituent of all organic compounds, many of which are essential to life on Earth The source of the carbon found in living matter is carbon dioxide in the air or dissolved in water
- Germination | Description, Process, Diagram, Stages, Types, Facts . . .
Germination, the sprouting of a seed, spore, or other reproductive body, usually after a period of dormancy The absorption of water, the passage of time, chilling, warming, oxygen availability, and light exposure may all operate in initiating the process
- How photosynthesis and its light and dark reactions work | Britannica
photosynthesis, Process by which green plants and certain other organisms transform light into chemical energy
- Plant cell | Definition, Diagram, Model, Labeled, Characteristics . . .
A plant cell is the basic unit of all plants Plant cells, like animal cells, are eukaryotic, meaning they have a membrane-bound nucleus and organelles Their characteristic cell wall is composed of cellulose, and they contain chloroplasts for photosynthesis
- Leaf | Definition, Parts, Function | Britannica
Leaf, any usually flattened green outgrowth from the stem of a vascular plant Leaves are the primary sites of photosynthesis and manufacture food for plants They are an integral part of the stem system and can be modified into a variety of other plant organs
|
|
|