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Ask QuestionPosted by Anjali Kumari 5 years, 3 months ago
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Posted by Ayush Pandey 5 years, 2 months ago
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Anjali Kumari 5 years, 3 months ago
Shristi . 5 years, 3 months ago
Posted by Ratna Swetha Kancharla 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
- Loudness: Loudness is the response of ear to the sound. Loudness is proportional to the square of the amplitude of the vibration body producing sound. The more the amplitude of vibration, the sound is the loud. The lesser the amplitude of vibration, the sound is feeble.
Loudness = k.(Amplitude)2 (where k is the proportionality constant)
The loudness is expressed in a unit called decibel (dB).
Posted by Ratna Swetha Kancharla 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Wavelength: The distance between 2 consecutive crest or troughs is called Wavelength. It is represented by the symbol λ(lamda). Unit is m.
Posted by Ratna Swetha Kancharla 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
- Inertia is the natural tendency of an object to resist a change in its state of motion or of rest.
- A force that is just enough to cause a small cart to pick up a large velocity will produce a negligible change in the motion of a train, because of train’s large inertia.
Posted by Kunal Hazra 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Mitochondria are known as the powerhouse of the cell because it is responsible for the extracting energy from food through cellular respiration. The energy is released in the form of adenosine triphosphate (ATP) it is an energy currency of the cell.
Posted by Rishik Rishik 5 years, 3 months ago
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Posted by Death Legends 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
Cellular metabolism: Reactions that break down food into nutrients to be used by the cell for energy and the reactions that combine molecules to produce larger products. Cell metabolism provides a reflection of the health status of the cell. The mitochondrion is the main powerhouse of the cell in which bioenergetic processes occur by the uptake of fuel sources such as glucose and fatty acids and converts them into energy in a series of enzymatic reactions.
Posted by Rayan Farooq 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
A horse pushes the ground in the backward direction. According to Newton’s third law of motion, a reaction force is exerted by the Earth on the horse in the forward direction. As a result, the cart moves forward.
Posted by Riya Jain 5 years, 3 months ago
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Rayan Farooq 5 years, 3 months ago
Posted by Vaibhav P 5 years, 3 months ago
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Harshit Bothra 5 years, 3 months ago
Harshit Bothra 5 years, 3 months ago
Posted by Sanyog Pandey 5 years, 3 months ago
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Posted by Chitralekha Khaund 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
Plant Parts and Animal Products as Food:
The parts of a flowering plant includes – roots, stems, leaves, flower, fruit and seeds.We eat different parts of a plant as food material like its roots, stems, leaves, flowers, fruits and seeds.
Posted by Chitralekha Khaund 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
| Animal Cell | Plant Cell |
|
i. Animal cells are generally small in size. ii. Cell wall is absent. iii. Animal cells have a single highly complex and prominent Golgi apparatus. iv. Animals cells have centrosome and centrioles. |
i. Plant cells are larger than animal cells. ii. The plasma membrane of plant cell is surrounded by a rigid cell wall of cellulose. iii. Plant cells have many simpler units of Golgi apparatus, called dictyosomes. iv. Plant cells lack centrosome and centrioles. |
Posted by Alex Saji 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
| Plant Cell | Animal Cell |
| 1. They are larger in size. | 1. They are smaller in size. |
| 2. Cell wall is present. | 2. Cell wall is absent. |
| 3. Lysosomes are absent or very few in number | 3. Lysosomes are larger in number. |
| 4. Plastids are present. | 4. Plastids are absent. |
| 5. Subunits of Golgi bodies known as dictyosomes are present. | 5. Prominent Golgi bodies are present. |
| 6. Vacuoles are larger in size. | 6. Vacuoles are smaller in size. |
Posted by Shaun Fernandes 5 years, 3 months ago
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Posted by Devesh More 5 years, 3 months ago
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Kanav Dumra 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
- A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions.
- For Example: - Soap solution, Milk, Ink, Blood and solutions of synthetic detergents.
Posted by Kamaldeep Rao 5 years, 3 months ago
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Posted by Devesh More 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Meristematic cells divide frequently and give rise to new cells and hence they need dense cytoplasm and thin cell wall. Vacuoles causes hindrance in cell division as it is full of cell sap to provide turgidity and rigidity to the cell. Also vacuoles basically serve the purpose of storing of nutrients, excess salts etc. Meristematic cells do not need to store these nutrients as they have compact shape.
Posted by Aniket Raj 5 years, 3 months ago
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Posted by Aniket Raj 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
The cellular components are called the Cell Organelles. These cell organelles are membrane-bound, present within the cells and are distinct in their structures and functions. They coordinate with their functions efficiently for the normal functioning of the cell. Few of them functions providing shape and support, whereas some are involved in the locomotion and reproduction of a cell. There are various organelles present within the cell and are classified into three categories based on the presence or absence of membrane.
Organelles without membrane: The Cell wall, Ribosomes, and Cytoskeleton are membrane-bound cell organelles. They are present both in prokaryotic cell and the eukaryotic cell.
Single membrane-bound organelles: Vacuole, Lysosome, Golgi Apparatus, Endoplasmic Reticulum are single membrane-bound organelles present only in a eukaryotic cell.
Double membrane-bound organelles: Mitochondria and chloroplast are double membrane-bound organelles present only in a eukaryotic cell.
Posted by David Tiprasa 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Natural Resources – A Resource which exists in nature is called a Natural Resource. It is not produced by any human being; rather it is available in nature itself. Human beings and other animals depend upon these resources for their existence.
Posted by Anoop Ajith 5 years, 3 months ago
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Posted by Sangeeta Dedha 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Arthropoda
This is the largest group of animals
The bodies of the organisms belonging to this group are bilaterally symmetrical and segmented.
These organisms have an open circulatory system. Therefore the blood does not flow in a well-defined blood vessel.
The coelomic cavity of these organisms is blood-filled.
These organisms have jointed legs.
Examples of organisms belonging to this group are prawns, butterflies,
houseflies, spiders, scorpions and crabs.
Posted by Kanav Dumra 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
The sense of smell is not considered a form of matter. However, the smell or odor of a substance is classified as matter. The smell of any substance (say, perfume) is the gaseous form of that substance which our olfactory system can detect (even at very low concentrations). Gas particles move very quickly (air particles move at 500 m/s on average at room temperature). However, a smell does not travel this fast. This is because its particles collide with each other and with particles of air very frequently.
Posted by Hasmitha Adas 5 years, 3 months ago
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Yash Dhyani 5 years, 3 months ago
Kanav Dumra 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
Pesticides are chemical substances that are meant to kill pests. In general, a pesticide is a chemical or a biological agent such as a virus, bacterium, antimicrobial, or disinfectant that deters, incapacitates, kills, pests.
Posted by Chitralekha Khaund 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
|
Mitosis |
Meiosis |
| Each chromosome replicates. The result is two genetically identical sister chromatids | Chromosomes not yet visible but DNA has been duplicated or replicated |
| Prophase I – crossing-over recombination – Homologous chromosomes (each consists of two sister chromatids) appear together as pairs. Tetrad is the structure that is formed. Segments of chromosomes are exchanged between non-sister chromatids at crossover points known as chiasmata (crossing-over) | Prophase –Each of the duplicated chromosomes appears as two identical or equal sister chromatids, The mitotic spindle begins to form. Chromosomes condense and thicken |
| Metaphase I Chromosomes adjust on the metaphase plate. Chromosomes are still intact and arranged as pairs of homologues | Metaphase -The chromosomes assemble at the equator at the metaphase plate |
| Anaphase I Sister chromatids stay intact. However, homologous chromosomes drift to the opposite or reverse poles | Anaphase – The spindle fibres begin to contract. This starts to pull the sister chromatids apart. At the end of anaphase, a complete set of daughter chromosomes is found each pole |
| Asexual Reproduction | Sexual Reproduction |
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Sayanm Diwakar 5 years, 3 months ago
1Thank You