Role of mycorrhizas in the mineral nutrition of host plants Mycorrhizas are very important in the uptake of nutrients such as P‚ N‚ K‚ Cu‚ Zn and Ca by plants especially in soils low in these nutrients. Since P is the most limiting nutrient in tropical soils‚ mycorrhizas are vital for improving P nutrition particularly for cultivated plants. External hyphae can absorb and translocate P to the host from soil outside the root depletion zone. The thin mycorrhizal hyphae (2-4 μm in diameter) are able
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Evolution of the Earth The planet earth has gone through much abuse and punishment in the past. Formed approximately 4.5 billion years ago‚ the earth has undergone multiple catastrophic asteroids erasing species after species. Due to geologic evidence‚ it is estimated over 90 percent of all life that had ever lived in this planet have been extinct. No more than the past 500 million years alone‚ 50-90 percent of all organisms on earth were wiped out of the geological timeline without any warning
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Earth in Danger Nobody can negate that a lot of phenomena has been changed in our world recently while wondering the reason of these changes. One of the main reason for a lot of change in our life is the rapped raise on temperature which is called global warming. Global warming is the rise in the average temperature of Earth’s atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century‚ Earth’s mean surface temperature has increased by about 0.8
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Bangladesh‚ Power‚ sources to eradicate the power crisis of Bangladesh‚ we have also discussed their present scenario and future potential. II. PRESENT SCENARIO At present‚ 53% of the total electricity generation of Bangladesh is from the power plants under public sector and 47% of the net generation of the country is from private sector [2]. Even though many extra units both from public and private sector have been added to the national grid‚ the power crisis is still a big issue in the country
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Marge Piercy uses descriptive imagery to convey the beauty of nature‚ and the idea that we must reconnect and appreciate the dirt and land that we all came from. Similarly‚ Michael Jackson’s “Earth Song” has a powerful message: stop the destruction of nature and society. Both “The Common Living Dirt” and “Earth Song” address the sabotage of nature‚ however Jackson’s song is more influential with its powerful‚ catchy music. Piercy’s poem paints a beautiful picture of nature with a vivid description
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Save Tigers 1411 left in India! Steps to save Tigers 10:21 AM | Posted by Rocky Singh Over the past century the number of tigers in India has fallen from about 40‚000 to less than 4‚000 (and possibly as few as 1‚500). Relentless poaching and clearing of habitat for agriculture have been the primary drivers of this decline‚ though demand for tiger skins and parts for "medicinal" purposes has become an increasingly important threat in recent years. However the news is not all bad. Research
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The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth’s gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation‚ warming the surface through heat retention (greenhouse effect)‚ and reducing temperature extremes between day and night (the diurnal temperature variation).The common name given to the atmospheric gases used in breathing and photosynthesis is air. Dry air contains roughly (by volume) 78.09% nitrogen‚ 20.95% oxygen
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INTRODUCTION Those plants that have healing properties are termed as medicinal plants or herbs. The plant kingdom is divided into several groups‚ but the botanical classification is beyond the scope of this section. However‚ medicinal plants can be simply classified as trees‚ shrubs‚ woody perennials‚ annuals and biennials‚ and climbers. (http://eatt1.tripod.com/amp1.html) Medicinal plants consist of components of therapeutic values and have been used as remedies for human diseases
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CTET NOVEMBER 2012 ANSWER KEY-SOLUTION BY WWW.EXAMHUNT.IN PAPER-2 : CHILD DEVELOPMENT November 18‚ 2012 Correct Answer It is subjective evidence of behavior and therefore does not provide feedback for scholastic area B and A 29 19 01 Oh really‚ your mother rang up Principal ma’am last night‚ 28 20 03 09 Did she seek an appointment with her ? Higher order divergent 27 02 26 06 Difficulty level of the question 26 01 24 07 Ability to monitor their own learning 21 13 06 24 The tendency to persist
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If you live within 100 metres of a centrally protected monument‚ you cannot expand your property anymore‚ according to an amendment to an Act on the protection of monuments. In a major step towards protection of monuments under the Archaeological Survey of India (ASI)‚ President Pratibha Patil on Wednesday signed the amendment to the Ancient Monuments and Archaeological Remains and Sites Act‚ 1958‚ which envisages ban on construction in the prohibited area of the ASI-protected monument. The
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