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Ask QuestionPosted by ?Sayeda Faria Ainee? 6 years, 11 months ago
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Posted by Moksh Jain 6 years, 11 months ago
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Vanshita Agarwal 6 years, 11 months ago
Yogita Ingle 6 years, 11 months ago
The maximum temperature of the day occurs generally in the afternoon and the minimum temperature occurs in the early morning.
Posted by Rajesh Kumar 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
- Nervous tissue –
The brain, spinal cord and nerves are all composed of the nervous tissue. The cells of this tissue are called nerve cells or neurons.
The neuron consists of 3 parts:
- The Cyton or Cell body - It contains a central nucleus and cytoplasm with deeply stained particles called Nissl’s granules.
- Dendrites - The dendrons are short processes arising from the cyton and branches into dendrites.
- Axon - It is a single, long cylindrical process which forms fine branches terminally. It has a swollen structure at its end called synaptic knob or bouton. It is also termed as the nerve fibre.
Posted by Nutan Pal 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
- Clinical Thermometer: A clinical thermometer consists of a long narrow uniform glass tube. It has a bulb at one end. This bulb contains mercury. Outside the bulb a small shining thread of mercury can be seen.Reading a thermometer: The temperature difference indicated between the two bigger marks should be noted and note down the number of divisions between these marks.
- Laboratory thermometer: The laboratory thermometer is used for measuring the temperature in science laboratory. This thermometer is made up of a long tube having a thin bore in it. The range of a laboratory thermometer is generally from – 10 degree Celsius to 110 degree Celsius. The laboratory thermometer should be held vertically while measuring temperature. The thermometer bulb should be surrounded from all sides by the substance whose temperature is to be measured and the level of mercury should be kept along the line of sight.
Posted by Keerthana Vengatraman 6 years, 11 months ago
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Posted by Ankur Tewari 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
- Their white fur gets camouflaged against the white background of snow protecting it from predators and also helps them catch their prey.
- Two thick layers of fur act as an insulator protecting them from the surrounding harsh climate.
- The polar bear carries out physical activities like swimming in order to keep warm
- In order to avoid getting overheated they move slowly and rest often.
- A strong sense of smell helps them in catching a prey
- Can remain submerged underwater closing its nostrils
Posted by Monika Sharma 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
The excretory system removes metabolic wastes from the body.
The major organs of excretion are the kidneys, a pair of bean-shaped organs located below the liver. The kidneys filter blood and regulate water balance in the body.
The skin, which removes excess water and salt via sweat, the lungs, which exhale carbon dioxide, and the liver, which breaks down toxic substances in the blood and convert nitrogenous waste into urea.
The human circulatory system is mainly composed of three main components. These are the heart, blood vessels, and blood. Let us now look at these components in further detail.
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart.
The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
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Meghna Thapar 5 years, 10 months ago
The type of plants and animals differ from forest to forest according to the different climatic conditions.
Forests also provide home to different mammals, birds, reptiles, insects, worms and microbes. Some human tribes also live in forests.
Posted by Himanshu Suryawanshi 6 years, 11 months ago
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Deepa Reddy 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Contaminant is a substance that pollutes, spoils, or poisons something
Posted by Devi Shree 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Plants absorb minerals and nutrients from the soil in liquid form through osmosis so they have to absorb much water even to take up small quantities of these nutrients.
Posted by Kirti Kaur 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
- Transportation is the conduction of substances like food, water and oxygen are necessary for the survival of living organisms.
- The circulatory system in humans performs the function of transportation of substances throughout their body parts.
- Xylem and phloem are the vascular tissues that help in the transportation of water, minerals and food in the plants.
Posted by Kamlesh Rani 6 years, 11 months ago
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Akankshya Dhal 6 years, 11 months ago
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A manhole is a large hole in a road or path, covered by a metal plate that can be removed. Workers climb down through manholes when they want to examine or clean the drains.
Posted by Kashyap Mishra 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Autumn, season of the year between summer and winter during which temperatures gradually decrease. It is often called fall in the United States because leaves fall from the trees at that time.
Posted by Nishtha Shukla 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Forests have perennial trees of Sal, Sheesham, Teak, Banyan, Neem, Peepal, Bamboo, etc.
A forest has annual, biennial and perennial plants. Herbs are mostly annuals with a life span of one year. Biennials have a life span of two years whereas perennials can survive for several years. These include shrubs and trees.
The trees produce enough seeds and the forest floor provides favourable conditions for them to germinate and develop into seedlings.
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Meghna Thapar 5 years, 6 months ago
In this situation, a very large current can occur, producing a lot of heat and a fire hazard. If a short circuit occurs—or even if too many appliances get hooked up to one wire so that too much current flows—the wire in the fuse heats up quickly and melts, breaking the circuit and preventing a fire from starting. An overcurrent occurs when the current exceeds the rated amperage capacity of that circuit or of the connected equipment (such as an appliance) on that circuit. An overcurrent can be caused by overloading the circuit or by a short circuit, a ground fault, or an arc fault.
Posted by Krish Jagga 6 years, 11 months ago
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Posted by Karri Suribabu 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Forests are an important renewable natural resource. They are useful in the following ways:
- Plants purify air by utilizing carbon dioxide in the atmosphere. They also maintain a balance between oxygen and carbon dioxide and prevent global warming on earth.
- They provide food to wild animals directly or indirectly. Herbivores eat plants and carnivores prey upon herbivores.
- They provide useful materials like firewood, timber, bamboo, wood for paper, gum, resin, fibre, honey, bee wax, bidi leaf, etc. They also provide spices like black pepper, cardamom, cinchona, cinnamon, etc.
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Meghna Thapar 5 years, 10 months ago
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