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Meghna Thapar 5 years, 10 months ago
The method of separating husk from grains with the help of wind is called winnowing. This method is based on the fact that the husk is very light and the grains are comparatively heavy. It is done by using a ‘winnowing basket’ called ‘chhaaj’ in Hindi.
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Meghna Thapar 5 years, 10 months ago
The reproductive method in which an organism produces an outgrowth on its body surface, which then matures and develops into a new individual is called budding. Example - Hydra.
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Meghna Thapar 5 years, 10 months ago
Dispersal of seeds means to scatter seeds over a wide area. Seeds and fruits of plants are carried away by wind, water and animals.
Winged seeds such as those of drumstick and maple light seeds of grasses or hairy seeds
of aak (Madar) and hairy fruit of sunflower get blown off with the wind to faraway places. Some seeds are dispersed by water. These fruits or seeds usually develop floating ability in the form of spongy or fibrous outer coat as in coconut and lotus.
Some seeds are dispersed by animals, especially spiny seeds with hooks which get attached to the bodies of animals and are carried to distant places. Examples are Xanthium and Urena. Some seeds are dispersed when the fruits burst with sudden jerks. The seeds are scattered far from the parent plant. This happens in the case of castor and balsam.
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Gaurav Seth 7 years, 1 month ago
Climate: The sum total of weather conditions and variations over a large area for a long period of time (more than thirty years)
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Posted by Ashwani Kumar Tiwari Ashwani Kumar Tiwari 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
| Seedling | Sapling |
| Very young trees with a diameter of up to 1 inch | Young tree of diameter of 1 to 5 inches |
| Followed by Stage of sapling | Followed by Stage of matured tree |
| The young plant arising from seed is known as seedling. This is the most youngest tree form. | The young tree is known as sapling. |
Posted by Anisa Saji 7 years, 1 month ago
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Gaurav Seth 7 years, 1 month ago
| <div align="center" class="MsoNoSpacing" style="text-align:center; padding:5.25pt">Aerobic respiration</div> | <div align="center" class="MsoNoSpacing" style="text-align:center; padding:5.25pt">Anaerobic respiration</div> |
| <div class="MsoNoSpacing" style="padding:5.25pt">It occurs in the presence of O2.</div> | <div class="MsoNoSpacing" style="padding:5.25pt">It occurs in the absence of O2.</div> |
| <div class="MsoNoSpacing" style="padding:5.25pt">It involves the exchange of gases.</div> | <div class="MsoNoSpacing" style="padding:5.25pt">Exchange of gases is does not happen.</div> |
| <div class="MsoNoSpacing" style="padding:5.25pt">It occurs in cytoplasm and mitochondria.</div> | <div class="MsoNoSpacing" style="padding:5.25pt">It occurs only in cytoplasm.</div> |
| <div class="MsoNoSpacing" style="padding:5.25pt">It always releases CO2 and H2O.</div> | <div class="MsoNoSpacing" style="padding:5.25pt">End products vary.</div> |
Posted by Anisa Saji 7 years, 1 month ago
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Gaurav Seth 7 years, 1 month ago
Percolation rate of water in soil: The phenomenon of absorption of water by soil is termed as percolation. The rate of absorption is different for different types of soils. The rate of absorption of a soil depends on its composition. A soil with more percolation rate can hold water for longer time. On the other hand a soil with poor percolation rate will hold water for longer time. Percolation rate helps in selection of suitable soil for crop growth.Percolation rate can be calculated by using the below formula.
Percolation rate =
Amount of water (ml)/ Percolation time (min)
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Desertification is a type of land degradation in which a relatively dry area of land becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife .
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Meghna Thapar 5 years, 10 months ago
A young tree with a slender trunk is known as a sapling. Whereas a seedling is a young plant sporophyte developing out of a plant embryo from a seed. Seedling development starts with germination of the seed.
Posted by Gkv ----Varma ----2468 ---23456 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
As long as their necks are, they actually have the same number of neck bones that you have. Though all giraffes have spots, no two giraffes have the exact same spot pattern, just like no one else has your fingerprints. Their spots help them blend in, making it harder for enemies to see them.
Posted by Sanskruti Somu 7 years, 1 month ago
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Gkv ----Varma ----2468 ---23456 7 years, 1 month ago
Yogita Ingle 7 years, 1 month ago
Concave means hollowed inward or curving in; so, concave lenses are hollowed inward. A concave lens is also called as a negative lens or a diverging lens. There are numerous uses of concave lens like in telescopes, cameras, lasers, glasses, binoculars, etc.
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Meghna Thapar 5 years, 10 months ago
Porcupine is an animal with a covering of long, sharp quills (= stiff hairs like needles) on its back.
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