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Priya Sharma 9 months, 2 weeks ago
Few rules to keep homework help section safe, clean and informative.
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Posted by Rahul Paswan 3 years, 2 months ago
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Sia ? 3 years, 2 months ago
आमाशय, ग्रास नली और छोटी आंत के बीच में स्थित होता है। यह छोटी आंतों में आंशिक रूप से पचे भोजन (अम्लान्न) को भेजने से पहले, अबाध पेशी ऐंठन के माध्यम से भोजन के पाचन में सहायता के लिए प्रोटीन-पाचक प्रकिण्व(एन्ज़ाइम) और तेज़ अम्लों को स्रावित करता है (जो ग्रासनलीय पुरःसरण के ज़रिए भेजा जाता है).
Posted by Pankaj Kumar 3 years, 3 months ago
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Posted by Patel Darshan_1 3 years, 4 months ago
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Sia ? 3 years, 4 months ago
| Autotrophs | Heterotrophs |
| Type of Organisms | |
| Usually members of the plant kingdom and certain unicellular organisms like cyanobacteria | All members of the animal kingdom |
| Mode of Nutrition | |
| Autotrophs are producers which prepare their own food. | Heterotrophs are the consumers who depend on other sources for their food. |
| Classified into | |
| These can be classified as photoautotrophs and chemoautotrophs. | These can be classified as photoheterotrophs and chemoheterotrophs. |
| Presence of chloroplasts | |
| The chloroplast helps in preparing food. | They do not contain chloroplast, so cannot prepare food. |
| Energy is obtained from | |
| They obtain energy from inorganic sources by converting light energy into chemical energy. | They obtain energy directly or indirectly from other organisms. |
| Energy Storage | |
| Autotrophs can store light energy and chemical energy. | Heterotrophs cannot store energy. |
| In Food Chain | |
| They are placed at the primary level in the food chain. | These are placed in the secondary or tertiary level in the food chain. |
| Locomotion | |
| They cannot move from their place. | Can move from one place to another in search of food and shelter. |
| Examples | |
| Green plants, algae and a few photosynthetic bacteria are examples of autotrophs. | Cows, buffaloes, tigers, horses, humans are examples of heterotrophs. |
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Sia ? 3 years, 8 months ago
The term ecology denotes the web of physical and biological systems and processes of which humans are one element. Mountains and rivers, plains and oceans, and the flora and fauna that they support are a part of the ecology.
Posted by Satya Isshu 3 years, 8 months ago
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Sia ? 3 years, 8 months ago
Magnesium ribbon should be cleaned with sandpaper before burning in air in order to remove white layer of magnesium oxide (MgO) from its surface which hinders the burning of magnesium.
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Vishal Kumar Gupta 3 years, 9 months ago
Yogita Ingle 4 years ago
अवतल लेंस का मुख्य फोकस (Principle Focus) : अवतल लेंस पर मुख्य अक्ष के समांतर प्रकाश की अनेक किरणें आपतित होती हैं। ये किरणें लेंस से अपवर्तन के पश्चात मुख्य अक्ष के एक बिंदु से अपसरित होती प्रतीत होती हैं। मुख्य अक्ष पर यह बिंदु अवतल लेंस का मुख्य फोकस कहलाता है।
Posted by Anushka Chauhan 4 years ago
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Yogita Ingle 4 years, 2 months ago
he two laws of reflection are:
(i) the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane.
(ii) the angle of reflection (<i>r</i>) is always equal to the angle of incidence (<i>i</i>)
∠<i>r</i> = ∠<i>i</i>
Gaurav Seth 4 years, 2 months ago
Laws of Reflection of light:
- The angle of incidence and angle of reflection is equal.
- The incident ray, reflected ray and normal to the point of reflection lie in the same plane.
The angle of incidence is denoted by 'i' and angle of reflection is denoted by 'r'. The law of reflection is applicable to all types of reflecting surface.
Posted by Pankaj Gautam 4 years, 2 months ago
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