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Mangrove Ecosystem

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  Mangroves: Nature’s Coastal Guardians Introduction Mangroves are a unique group of trees and shrubs that thrive in the meeting zone of land and sea. They grow along tropical and subtropical shorelines, forming dense forests in muddy, oxygen-poor soils. Their remarkable adaptations allow them to withstand saltwater immersion and tidal fluctuations. As keystone species , mangroves shape coastal ecosystems and influence both marine and terrestrial life. --- Distribution and Habitat Mangroves span more than 120 countries, with the largest concentrations in Southeast Asia , South Asia , West Africa , northern Australia and the Caribbean . They occupy intertidal zones where freshwater rivers mix with ocean tides, creating brackish water conditions. Their roots anchor in soft sediments, stabilizing shorelines and trapping sediment. These forests often border estuaries , lagoons and sheltered bays. --- Physical Adaptations Mangroves possess several specialized adaptations that enabl...
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Mosquito

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  The mosquito is a small flying insect found all over the world. It has a thin body, two wings, and six long legs. Though tiny in size, mosquitoes have a big impact on human life. They are well known for biting and sucking blood, especially during the evening and night. Benefits Mosquitoes are a part of nature’s food chain. Their larvae live in water and serve as food for fish, frogs, and other aquatic creatures. Adult mosquitoes are eaten by birds, bats, and dragonflies. In some cases, mosquitoes also help in pollination when they feed on nectar from flowers. Harm Despite a few benefits, mosquitoes cause great harm to humans. They spread dangerous diseases like malaria, dengue, and chikungunya, which can make people very sick or even cause death. Their bites cause itching, swelling, and discomfort. Mosquitoes breed in stagnant water, so dirty surroundings help them multiply quickly. They also disturb our sleep with their buzzing sound at night.
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A harmful weed

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  Sphagneticola trilobata ( Singapore daisy) Introduction: Singapore daisy ( Sphagneticola trilobata ) is a fast-growing perennial groundcover plant known for its bright yellow, daisy-like flowers and dense, glossy green foliage. Native to Central and South America, it has been introduced to many tropical and subtropical regions as an ornamental plant and for erosion control. However, due to its rapid spread and ability to smother other vegetation, it is now considered one of the most invasive plant species in several countries. Description : Singapore daisy has creeping stems that can grow up to 2 meters long, rooting at the nodes wherever they touch soil. Its leaves are dark green, thick, and usually have three distinct lobes. The flowers are small but vibrant yellow, measuring about 2–3 cm in diameter. The plant thrives in warm climates, tolerates poor soils, and can grow in both sunny and partially shaded areas. Habitat and Spread: This plant prefers moist, well-drained soils ...
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নটর ডেম কলেজ ভর্তি পরীক্ষা ২০২৩ প্রশ্ন

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  নটর ডেম কলেজ ভর্তি পরীক্ষা- ২০২৩ (১৮-০৮-২৩) সেট - c [১-৩৪ পর্যন্ত প্রশ্নের মান ১ ও ৩৫ নং প্রশ্নের মান ৫।  সময় ৪০ মিনিট] ১. প্রকৃত উপসেট কাকে বলে? ২. a+ ar+ar 2  +....  অসীম গুণোত্তর ধারাটির অসীমতক সমষ্টি থাকার শর্ত কী? ৩. কার্তেসীয় গুণজ সেট কাকে বলে? ৪. লগারিদম বলতে কী বুঝ? ৫. ইয়ং এর গুণাঙ্কের মাত্রা সমীকরণ লিখ। ৬. একটি স্ক্রু- গজের প্রধান স্কেলের 0 দাগের সাথে  বৃত্তাকার স্কেলের 5 নং দাগ মিলে। প্রধান স্কেলের ক্ষুদ্রতম একভাগের দৈর্ঘ্য 0.5 mm ও বৃত্তাকার স্কেলের ভাগসংখ্যা 50 হলে যান্ত্রিক ত্রুটি কত? ৭. একটি ঘনকের একবাহুর দৈর্ঘ্য 2 cm। এর ঘনত্ব 6600 kg m -3  হলে একে পানিতে নিমজ্জিত করলে আপাত ভর কত পাওয়া যাবে? ৮. পৃথিবীর ভর অপরিবর্তিত রেখে ব্যাসার্ধ দ্বিগুণ করলে ভূপৃষ্ঠে কোনো বস্তুর ওজন শতকরা কত হ্রাস পাবে? ৯. পরিবাহকত্ব ও আপেক্ষিক রোধের সম্পর্ক দেখাও। ১০. মেরুদণ্ডী প্রাণীদের শ্বাসনালির প্রাচীরে কোন টিস্যু পাওয়া যায়? ১১. ডিম্বাশয় থেকে নি:সৃত দুটি হরমোনের নাম লিখ। ১২. 2 g  N 2  তে কতটি N পরমাণু আছে? ১৩. বৃত্তকলা কাকে বলে? ১৪. Michael Madhusudan Dutt...
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Solar system journey

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Solar System Tour NASA's eyes Link : https://eyes.nasa.gov/apps/orrery/#/ Or  >> Tap on it <<  You can visit the whole solar system with this web app. This is created by NASA. Here are some pictures of this app 👇
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FIFA

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 The Fédération internationale de football association ( International Association Football Federation) is the international governing body of association football, beach soccer, and futsal. It was founded in 1904 to oversee international competition among the national associations of Belgium, Denmark, France, Germany, the Netherlands, Spain, Sweden and Switzerland. Headquartered in Zürich, Switzerland, its membership now comprises 211 national associations. These national associations must each also be members of one of the six regional confederations into which the world is divided: CAF (Africa), AFC (Asia and Australia), UEFA (Europe), CONCACAF (North & Central America and the Caribbean), OFC (Oceania) and CONMEBOL (South America). International Association Football Federation Fédération internationale de football association (FIFA) Logo Map of the members of FIFA according to their confederation Abbreviation FIFA [1] Founded 21 May 1904 ; 118 years ago Founded at Pari...
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