The boundary between the Proterozoic and the Phanerozoic eons was set when the first fossils of animals such as trilobites appeared. Life remained mostly small and microscopic until about 580 million years ago, when complex multicellular life arose, developed over time, and culminated in the Cambrian Explosion about 541 million years ago. This sudden diversification of … [Read more...]
Geological Time Scale: Hadean, Archean, Proterozoic & Phanerozoic
The geological time scale (GTS) divides and chronicles earth’s evolutionary history into various periods from the beginning to the present based on definite events that marked a major change in earth’s physical, chemical and biological features. Major changes in earth’s physical and biological history stretch over several millions of years and hence in GTS all the divisions … [Read more...]
DELP (UJALA) Scheme – Comparison: LED – CFL – Incandescent Bulb
Domestic Efficient Lighting Programme (DELP) or Unnat Jyoti by Affordable LEDs for All (UJALA) scheme Bachat Lamp Yojana "Bachat Lamp Yojana" was a launched in 2009 to reduce the cost of compact fluorescent lamps (CFLs, i.e., energy saving lights) sold to consumers. Implemented through the Bureau of Energy Efficiency (BEE) in India's Ministry of Power, the program's … [Read more...]
Non-Renewable Sources Of Energy
Non-Renewable Sources Of Energy Fossil fuels represent stored solar energy captured by plants in the past geological times. Coal, petroleum and natural gas are called fossil fuels, as they are the remains of prehistoric plants, animals and microscopic organisms that lived millions of year ago. During the Carboniferous period 275-350 million years ago, conditions … [Read more...]
Insectivorous Plants of India: Drosera, Pitcher Plant, Utricularia
Insectivorous Plants These plants are specialized in trapping insects and are popularly known as insectivorous plants. They are very different from normal plants in their mode of nutrition. They, however, never prey upon humans or large animals. Insectivorous plants can broadly be divided into active and passive types based on their method of trapping their prey. … [Read more...]