The rate of photosynthesis process is affected by several external ( enviromental) internal factor, these factors are Temperature Light Water Carbon dioxide 1. Light The ultimate source of light for photosynthesis is solar radiation. Out of total solar energy reaching to the earth, only a very small portion ( about 2%) is used in photosynthesis. Light varies in intensity, quality ( wavelength ) and duration. Under low light intensity the rate of photosynthesis is also low. At very high light intensity the photosynthesis is decreased due to photo oxidation of constituents. The quality or wavelength of light also affect photosynthesis. For eg. Green pigment chlorophyll mostly absorb blue and red light they reflect green light. Therefore photosynthesis is high in blue or red light and very low in green light 2. Temperature The rate of photosynthesis increase by increase in temperature upto 40°C. Above 40°C there is decrease in photosynthesis process. Similarly low temperature also st...
1. Potential resource Resources that found in a region but still not utilised due to lack of technology it is called potential resource. ( quality and quantity are also not known.) 1. Potential resource Those resources which quantity and quality are not known and we have not any advanced technology to use them. 2. Developed resource Those resources which quality and quantity are known and we have efficient technology to use them 3. Stock Those resources whose quality and quantity are known and we have technology to use them but not the advance technology. 4. Reserved resource Those resource whose quality and quantity is known and we have also efficient technology to use them but we reserved then for future generations. Development of resource Sustainable development The development which does not harm the environment adopting development technique in such a way that it should be available for future generations. Global initiatives on sustainable devel...
Washington : The US drugs regulator has granted emergency use authorisation to Johnson & Johnson’s single-dose Covid-19 jab, making it the third vaccine in the country’s fight against the pandemic. The other vaccines already in use are from Pfizer-BioNTech and Moderna, both needing two doses. J&J’s vaccine is also easier to store and transport as it doesn’t need to be kept frozen. “The authorisation of this vaccine expands the availability of vaccines, the best medical prevention method for Covid-19, to help us in the fight against this pandemic,” said Janet Woodcock of the US Food and Drug Administration (FDA). The FDA said the vaccine is about 67% effective in preventing moderate to severe/critical Covid-19 occurring at least 14 days after vaccination.
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