The plant makes transpiration , whereas the water vapour passes from the exposed parts of plant to the surrounding air and some of it condenses and forms drops , if you add the condensed...
Human body contains a system that is responsible for the extractions of oxygen from the air , and then transfers it to the blood , then to the cells of the body , this...
Mechanism of the transport in higher plants is a process that includes two different processes which are the transport of the water and the minerals from the root to the leaf , the transport...
Food is the main source of energy for all living organisms , where green plants make their own food during photosynthesis process from simple substances which are carbon dioxide gas and water , Sunlight...
Light is an essential form of energy , The Sun is the most important source of light energy , It is the main natural source , It gives us heat & light , where...
The atmosphere contains oxygen gas that necessary for the respiration process, It is a mixture of gases surrounding the Earth, It is attracted to Earth by gravity, It protects the Earth by absorbing ultraviolet...
