يحاط كل ثغر في ورقة النبات بخليتين متميزتين هما الخليتان الحارستان اللتان تحتويان على بلاستيدات خضراء ، وتعمل الخليتان الحارستان على تنظيم فتح الثغر وإغلاقه حسب...

تعد الأوراق أكثر أعضاء النبات تبايناً ، حيث تختلف من حيث الشكل و الحجم و النصل ، و أجزاء الورقة الخارجية هي : قاعدة الورقة التي تربط الورقة بالساق ، و تساعد على...

تجربة لإثبات وجود الثغور على سطح ورقة النبات ، والثغور عبارة عن فتحات تصل ما بين النسيج الداخلي لورقة النبات و الوسط الخارجي ، تؤدي وظيفة متناسقة حيث تسمح بتبادل...

ينشأ النبات الزهري من نمو جنين البذرة ، و يتكون من قسمين رئيسين : المجموع الجذري و يشمل الجذور ، و المجموع الخضري و يشمل الساق و الأوراق و الأزهار

ينشأ النبات الزهري من نمو جنين البذرة ، و يتكون من قسمين رئيسين : المجموع الجذري و يشمل الجذور ، و المجموع الخضري و يشمل الساق و الأوراق و الأزهار

لقطات فيديو تعرض شريحة مجهرية لطبقة البشرة في ورقة النبات وتبين الثغور والخلايا الحارسة ، حيث يحاط كل ثغر في ورقة النبات بخليتين حارستين تعملان على تنظيم فتح...

A Refreshing Drink - Discussion - English - 2nd Year Secondary - Term 2

A Refreshing Drink - Discussion - English - 2nd Year Secondary - Term 2

See the Algae Filled leaves in water

Green Leaves

See the Thick roots on the ground

Mosses on the wall

Mosses on the wall

lotus leaves

Studying the Plant Structure

Vector generated image of Black_and_white_colobus(Colobus angolensis):Range: Central Africa from Cameroon to Ethiopia and Tanzania Diet: It is exclusively vegetarian, feeding on Leaves, buds, seeds, shoots, and occasionally fruit Characteristics: Black and white Colobus monkeys have a long,...

Vector generated image of Indian Rhinoceros(Rhinoceros unicornis):Great One-horned Rhinoceros or the Asian One-horned Rhinoceros is a large mammal primarily found in north-eastern India and Nepal. It is confined to the tall grasslands and forests in the foothills of the Himalayas.These massive...

Vector generated image of Gaur/Indian bison(Bos gaurus):The biggest populations are found today in India. The gaur is the largest species of wild cattle, bigger than the Cape buffalo, water buffalo and bison.In North East India a tame version of the Gaur, known as Mithun is used as a farm animal...

Vector generated image of Proboscis Monkey -Nasosus Machedonus (Nasalis larvatus) opening its mouth:Proboscis monkey (a primate found only in Borneo). With its huge pendulous nose, a characteristic pot belly and strange honking sounds,There is only one species of the proboscis monkey, Nasalis...

Vector generated image of Western Gorilla(Gorilla gorilla) walking:The western lowland gorilla is found in the African countries of Cameroon, Central African Republic, Gabon, Congo, and Equatorial Guinea. The easternmost range of the western lowland gorilla is the Oubangui River .Habitat:Western...

Painting of Gorilla (Gorilla gorilla):It is an endangered animal.The western lowland gorilla is found in the African countries of Cameroon, Central African Republic, Gabon, Congo, and Equatorial Guinea. The easternmost range of the western lowland gorilla is the Oubangui River .Habitat:Western...

Painting of African Forest elephant( Loxodonta cyclot):It is mostly found in Africa.African elephants are distinguished from Asian elephants in several ways, the most noticeable being their ears which are much larger. The African elephant is typically larger than the Asian elephant and has a...

Painting of Woodchuck(Marmota monax):The Woodchuck aka groundhog (Marmota monax) is a rodent belonging to the group of large ground squirrels known as marmots.Habitat: Woodchucks live in open forests, forest edges, and rocky areas and by roadsides. One of the most obvious characteristics of...

Painting of Common mole-rat ( Cryptomys hottentotus):The Common mole rat, Cryptomys hottentotus, is a burrowing rodent found in the continent of Africa, specifically in the southwest Cape province, South Africa. It is also found in Lesotho, Malawi, Mozambique, Swaziland, Tanzania, Zambia, and...

Painting of Black-tailed prairie dog ( Cynomys ludovicianus):is a rodent of the family sciuridae found in the Great Plains of North America from about the USA-Canada border to the USA-Mexico borderIt diggs large burrows.Black-tailed prairie dogs live in complex communities, called...