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Ask QuestionPosted by Anu Prakash 5 years, 7 months ago
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Meghna Thapar 5 years, 6 months ago
The importance of an ecosystem is that it provides space to plants and animals to interact with each other as well as their physical environment. Through interactions they are interdependent on each other for their environment. Humans are fully dependent on Earth's ecosystems and the services that they provide, such as food, clean water, disease regulation, climate regulation, spiritual fulfillment, and aesthetic enjoyment. The relationship between human well-being and ecosystem services is not linear.
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Meghna Thapar 5 years, 6 months ago
Plants, algae and few bacteria are said to be autotrophic as they are able to prepare their own food, with the help of sunlight, air, and water. Conversely animals like cow, dog, lion, horse, etc. are said to be heterotrophic as they cannot prepare their own food and depends directly or indirectly on others for their nutrition.
Some plants cannot produce their own food and must obtain their nutrition from outside sources—these plants are heterotrophic. This may occur with plants that are parasitic or saprophytic. Some plants are mutualistic symbionts, epiphytes, or insectivorous.
Plant Parasites
A parasitic plant depends on its host for survival. Some parasitic plants have no leaves. An example of this is the dodder which has a weak, cylindrical stem that coils around the host and forms suckers. From these suckers, cells invade the host stem and grow to connect with the vascular bundles of the host. The parasitic plant obtains water and nutrients through these connections.
Saprophytes
A saprophyte is a plant that does not have chlorophyll and gets its food from dead matter, similar to bacteria and fungi (note that fungi are often called saprophytes, which is incorrect, because fungi are not plants). Plants like these use enzymes to convert organic food materials into simpler forms from which they can absorb nutrients.
A symbiont is a plant in a symbiotic relationship, with special adaptations such as mycorrhizae or nodule formation. Fungi also form symbiotic associations with cyanobacteria and green algae (called lichens). Lichens can sometimes be seen as colorful growths on the surface of rocks and trees. The algal partner (phycobiont) makes food autotrophically, some of which it shares with the fungus; the fungal partner (mycobiont) absorbs water and minerals from the environment, which are made available to the green alga. If one partner was separated from the other, they would both die.
Posted by Tarun Reddy 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Nutrition losses can happen due to the following reasons also.
- Leaching
- Denitrification
- Volatilization
- Crop removal
- Soil erosion and runoff etc.,
Posted by Manasmita Das 5 years, 7 months ago
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Posted by Frozen Princess 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
The process by which plants make their own food in the presence of sunlight, carbon-dioxide present in air, water, minerals and chlorophyll present in leaves is termed as photosynthesis.
- Plants absorb the water and minerals from the soil with the help of deep penetrated roots inside the soil and transport them to the leaves of the plants where synthesis of food takes place.
- The green pigment present in leaves known as chlorophyll helps the leaves of plant to capture the sunlight that act as the source of energy to carry out the process.
- After this the chlorophyll holding the cells of leaves in the presence of sunlight, carbon dioxide and water to produce carbohydrates in the leaves and is stored in the plants in the form of energy.
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Yogita Ingle 5 years, 7 months ago
- Absorption is the process by which digested food passes through the blood vessels in the wall of intestine.
- The inner wall of small intestine has finger like projections called villi which increases the surface area for absorption of food.
Posted by Durmila Naik 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Symbiosis is the combination of two Greek words ‘Sym’ means ‘with’ and ‘biosis’ means ‘living’, which means living together. In symbiosis or mutualism two different types of organisms live and work together for their mutual benefit from each other. They share shelter and nutrients, e.g. Lichens. Lichens are composite organisms composed of fungus and alga. Fungus is a saprophyte and alga is an autotroph. The Fungus supplies water and minerals to the cells of the alga while the alga supplies food; prepared by photosynthesis.
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Yogita Ingle 5 years, 7 months ago
Step I: The first step is the removal of the fleece of the sheep along with a thin layer of skin. This process is termed as shearing. The hair provides woollen fibres that are then processed to obtain woollen yarn.
Step II: The sheared fleece is systematically washed in tanks in order to remove the grease, dust and dirt. This is known as scouring.
Step III: The scoured hair is then sorted and sent to a factory where hair of different textures are separated or sorted.
Step IV: Here the small fluffy fibres, called burrs, are separated from the hair and the hair is scoured again and dried. The wool is then ready to be drawn into fibres.
Step V: The fibres are dyed into various vibrant colours because the natural colour of the fleece is black, brown or white.
Step VI: The fibres are then straightened, combed and finally rolled into yarn. The longer fibres are made into wool for sweaters whereas the shorter fibres are spun and woven into woollen cloth.
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Shreyshi Karn 5 years, 7 months ago
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