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Ask QuestionPosted by Faniswar Gope 7 years, 1 month ago
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Astha Kathpal 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
- Characteristics of images formed by a Convex Mirror:
|
Position of object |
Position of image |
Size of image |
Nature of image |
|
At infinity |
At focus F behind the mirror |
Highly diminished, point sized |
Virtual and erect |
|
Anywhere between infinity and the pole of the mirror |
Between P and F behind the mirror |
Diminished |
Virtual and erect |
Posted by Kishore Manoharan 7 years, 1 month ago
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Shubham Golui 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The polar bear has to move slowly; otherwise, its body will get overheated, because they have two thick layers of fur, as well as a layer of fat, under the skin which provide excellent insulation, and more physical activity can overheat their body.
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Sudhi Chaudhary 7 years, 1 month ago
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Konkana Bhattacharjee 7 years, 1 month ago
Posted by Sarfraj Khan 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The various modes of asexual reproduction in plants are as follows:
Vegetative propagation: It is the ability of a plant to produce new plants from roots, stems, leaves, and buds. Vegetative propagation is divided into two types. Natural vegetative propagation: This type of vegetative propagation occurs easily in nature and involves simple vegetative parts. Potato plant sprouting from an eye is a common example.
Artificial vegetative propagation: This type of vegetative propagation is performed manually and generally occurs in laboratory conditions. The formation of a complete plant from a stem cutting of rose is a common example of this method.
Budding: It involves the formation of a new individual from a bulb-like projection called a bud. The bud grows and gets detached from the parent to form a new individual. It is commonly observed in yeast.
Fragmentation: It is a form of asexual reproduction where a new organism is formed from the fragments of the parent body. It is the only mode of asexual reproduction in Spirogyra.
Spore formation: Many non-flowering plants reproduce through spore formation. Spores are tiny cells protected by a thick wall. Fungi such as bread moulds reproduce asexually using this method.
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Konkana Bhattacharjee 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
Plant reproduction is the production of new offspring in plants, which can be accomplished by sexual or asexual reproduction.
Posted by Harnoor Kaur 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Cellular respiration: Respiration happens inside the cells. As respiration happens inside the cell, it is also called cellular respiration. A cell organelle; called mitochondria; is the site of cellular respiration.
Aerobic respiration: Aerobic respiration takes place in the presence of oxygen. Carbon dioxide and water are the end products of aerobic respiration. Aerobic respiration happens in most of the organisms.
Posted by Shelly Gupta 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems. Algal blooms are the result of a nutrient, like nitrogen or phosphorus from fertilizer runoff, entering the aquatic system and causing excessive growth of algae. An algal bloom affects the whole ecosystem; it can have benign results like simply feeding higher tropic levels to more harmful effects like blocking the sunlight from reaching other organisms, causing a depletion of oxygen levels in the water, and, depending on the organism, secreting toxins into the water. The process of the oversupply of nutrients leading to algae growth and oxygen depletion is called eutrophication. Blooms that can injure animals or the ecology are called "harmful algal blooms" (HAB), and can lead to fish die-offs.
Posted by Jigyansha Sahoo 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
An electric bell consists of an iron core, on which is wound a wire as a coil. One end of the coil is connected to one terminal of a battery, and the other end to a steel rod that acts like a spring for the hammer touching the screw contact. The other terminal of the battery is connected to the screw contact with a switch in the middle.
Working of an electric bell
Electric current flows through the coil when the switch is ON, and the iron core acts as an electromagnet. The iron core attracts the hammer towards it. The hammer hits the bell and produces a sound. The circuit breaks at the screw contact when the hammer moves towards the iron core. At this point, the iron core ceases to be an electromagnet. The hammer is pulled back to its original position due to the spring action of the steel rod, and then touches the contact again to complete the circuit. The circuit is completed and current flows through the coil again, and the hammer strikes the bell again. The process repeats itself and you hear a ringing sound since the hammer keeps hitting the bell, until the switch is released.
Posted by Mis Ba 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
Peristalsis is the process of wave-like contractions and relaxations of the alimentary tract that propels the food forward through the tract. The wall of oesophagus is muscular. When the slightly digested food enters the food pipe, the walls of the oesophagus starts contraction and expansion movements called peristaltic movements which push the food into the stomach. Digestion does not take place in the oesophagus.
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Mis Ba 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
Resistors in Parallel: The potential difference across each resistance is the same and is equal to the potential difference across the combination. The main current divides itself, and different current flows through each resistance. A series arrangement not used for connecting domestic electrical appliances in a circuit because if one electrical appliance stops working due to some defect, then all other appliance also stop working as whole circuit broken.
Posted by Lavisha Jain 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
Water is generated from factories, offices, hospitals, institutions, etc. It also includes rainwater that has run down the street during a storm or heavy rain.
The water containing wastes from various sources is called sewage whereas a network of big and small pipes are called sewers that forms sewerage.
Posted by Akash Meena 7 years, 1 month ago
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Konkana Bhattacharjee 7 years, 1 month ago
Gaurav Seth 7 years, 1 month ago
When an image is formed on a screen with the help of a mirror, it is called a Real Image. Similarly, animage which can't be obtained on a screen with the help of a mirror, it is called Virtual Image.
Posted by Vivek Srivastava 7 years, 1 month ago
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Gaurav Seth 7 years, 1 month ago
When an image is formed on a screen with the help of a mirror, it is called a Real Image. Similarly, animage which can't be obtained on a screen with the help of a mirror, it is called Virtual Image
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