External Factors That Influence Growth and Development
Kamis, 09 November 2017
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External factors are factors that come from outside of the body of the organisms theirself.
Factors included into external factors among others are as follows.
Food
Food is main factor for growth and development of the organisms. The food is raw material which then will be processed in metabolism event, so it produces energy. The energy is very required for growth.
In plants, their food in the form of substance and mineral (nutrient element) which is contained in the soil. The plants will get growth disturbance (abnormal) if they lack of substance and
Temperature
Every organism has tolerance limit to temperature. If the temperature of surrounding is too cold or too hot, the organisms cannot grow and develop perfectly. But every organism has tolerance limit to different surrounding temperature.
light (Ray)
Light (ray) is very required for life, mainly sunlight. All organisms need sunlight. For example, green plants need sunlight to support photosynthesis process. Besides, the light also has function as factor of growth inhibitor, because can make nonacttvatian of auxin growth hormone
Air Humidity
In certain limits, the humidity influences vapourization process. The humid soil and air have good influence for growth.
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