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Ask QuestionPosted by Aman Jangid 6 years, 6 months ago
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Posted by Kalai Selvi 6 years, 6 months ago
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Yogita Ingle 6 years, 6 months ago
There are five major groups of microorganisms:
- Bacteria: They are single celled disease-causing microorganisms. They can be spiral or rod-shaped.
- Fungi: They are mostly multicellular disease-causing microbes. Bread moulds are common examples of fungi.
- Protozoa: They mainly include organisms such as Amoeba, Plasmodium, etc. They can be unicellular or multicellular.
- Virus: Viruses are disease-causing microbes that reproduce only inside |the host organism.
- Algae: They include multicellular, photosynthetic organisms such as Spirogyra, Chlamydomonas, etc
Posted by Sneha Dua 6 years, 6 months ago
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Posted by Ram Shinde 6 years, 6 months ago
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R Nagendra Rao 6 years, 6 months ago
Yogita Ingle 6 years, 6 months ago
The process of loosening and turning of soil is called ploughing.
Ploughing of fields is done by using an implement called plough. Plough are made up of wood or iron and they have an iron tip for easy penetration into the soil.The ploughs are pulled by tractor or a pair of bullocks.
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Yogita Ingle 6 years, 6 months ago
Let the interior angle of the regular polygon be x.
Therefore, the exterior angle is x/4.
Exterior angle + adjacent interior angle = 180°
x/4 + x. = 180°
5x /4. = 180°
x. = 180° * 4/5
= 144°
The interior angle is 144°.
The exterior angle is 36°.
Let n be the number of sides.
n = 360°/ exterior angle
= 360° / 36°
= 10
The number of sides of a regular polygon is 10.
Posted by Jayanti Rawat 6 years, 6 months ago
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Posted by Jayanti Rawat 6 years, 6 months ago
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Sia ? 6 years, 6 months ago
Get MCQs here : <a href="https://mycbseguide.com/cbse-online-tests.html">https://mycbseguide.com/cbse-online-tests.html</a>
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Posted by Aryan Singh 6 years, 6 months ago
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Yogita Ingle 6 years, 6 months ago
The process of loosening & turning the soil is called tilling of the soil. It is important to loosen the soil because:- It allows the roots of the plant to penetrate deep into the soil.
Posted by Sadhya Prasad 6 years, 6 months ago
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Posted by Aman Gupta 6 years, 6 months ago
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Meghna Thapar 5 years, 10 months ago
A plastic is synthetic material which can be moulded into desired shape when soft and then hardened to produce a durable article.Plastics are polymers. A number of articles made up of plastics are used in our daily life like water pipes, pens, combs, toothbrushes, toys, shoes, etc.
Posted by Jiten Sehg 6 years, 6 months ago
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Aryan Vats 6 years, 6 months ago
Aryan Vats 6 years, 6 months ago
Aryan Vats 6 years, 6 months ago
Posted by Annesha Mondal 6 years, 6 months ago
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Yogita Ingle 6 years, 6 months ago
In ∆ABC, AB = 15 cm , BC = 13 cm and AC = 14 cm.
By Heron's formula ,
S = ( A + B + C ) / 2
S = ( 15 + 13 + 14 ) / 2
S = 42 / 2
S = 21
Now, area of triangle
= √S (S–A) (S–B) (S–C)
= √21 (21–15) (21–13) (21–14)
= √21 (6) (8) (7)
= √7056
= 84 cm2
Again,area of triangle = 1/2×base×altitude=84 cm2
1/2×14×altitude = 84
7 × altitude=84
altitude = 84/7
Altitude = 12cm
Therefore, the area of ∆ABC is 84cm² and its altitude on AC is 12 cm.
Posted by Savita Soni 6 years, 6 months ago
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Yogita Ingle 6 years, 6 months ago
Salivary glands secrete saliva in the mouth which helps in the digestion of food. Saliva is 98% of water but contains electrolytes, antibacterial compounds, mucus, enzymes etc. It is an exocrine gland which secretes substances outside the body or within a body cavity. Saliva has lubricating properties. It protect the inside cavity of our mouth, teeth and throats as we begin to swallow the food bolus. It also cleanses the mouth after the meal and dissolves it into chemicals that we perceive as taste.
Posted by Gayathri M 6 years, 6 months ago
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Yogita Ingle 6 years, 6 months ago
Distance =350
time =7/2
speed =distance ÷time
=350×2/7
=100 km/hr
speed =100 km/hr
time = 5hours
distance = 100 × 5
= 500 km
Posted by Varuni Bathla 6 years, 6 months ago
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Sia ? 6 years, 6 months ago
सन्त कवि कबीरदास ने लिखा है-
काल सो करै आज कर आज करे सो अब।
पल में परलै होयगी बहुरि करैगो कब।।
अर्थात् जो कल करना है वह आज ही कर लो और जो आज करना है उसे अभी कर लो क्योंकि प्रलय पल भर में हो जाती है। यदि प्रलय आ गई तो तुम्हारे मंसूबे धरे के धरे रह जाएँगे और तब अपने करणीय कर्म भला कब कर पाओगे।कबीर ने इस सूक्ति के माध्यम से यह बताया है कि हमें काम को टालने की प्रवृत्ति से बचना चाहिए। काम की टाल-मटोली करने वालों के काम कभी पूरे नहीं हो पाते। इसलिए समयानुसार कार्य कर लेना चाहिए ।
समयनियोजन को सफलता का मूल मन्त्र माना जाता है। दिन में 24 घण्टे सबके लिए होते हैं किन्तु जो समयबद्ध ढंग से काम निपटाते है, अपने लिए लक्ष्य निर्धारित करने वाले निश्चय ही सफलता प्राप्त करते है। जिसे समय नियोजन का गुर आ गया वह कभी असफल हो ही नहीं सकता। चाहे परीक्षा में सफलता प्राप्त करनी हो या नौकरी में हमें चरण बद्ध एवं समय बद्ध ढंग से आगे बढ़ना चाहिए। जो लोग काम को टालने की प्रवृत्ति रखते हैं या निर्णय नहीं ले पाते उन्हें न तो कोई पसन्द करता है और न ही वे कोई उपलब्धि प्राप्त कर पाते है। जितने भी सफल व्यक्ति है उनमें ये दो विशेषताएँ अवश्य पाई जाती है-त्वरित निर्णय लेने की क्षमता और काम को अविलम्ब करने का हुनर। वे न तो निर्णय टालते हैं और न काम को टालते है।किसी कार्य को टालना हमारे आलस्य को प्रकट करने के साथ हमारी कार्य क्षमता को भी प्रभावित करता है और पछतावे के सिवा कुछ भी नहीं देता।
काम को टालने की प्रवृत्ति व्यक्ति के विकास में बाधक है। एक बार जब किसी व्यक्ति पर से भरोसा उठ जाता है तो उसकी प्रगति रुक जाती है। किसी ने सच कहा है-कल कभी नहीं आता जो करना है अभी कर लो, आज के काम को कल पर टालने की प्रवृत्ति त्याग दो तभी जीवन में सफलता मिलती है गया ,समय कभी लौट कर नहीं आता इसलिए आवश्यक है कि समय की माँग के अनुसार उपलब्ध साधनों का सदुपयोग करते हुये कार्य करने वाला ही बुद्धिमान होता है। समझदार लोग तो पहले से ही स्थिति का विश्लेषण कर समय को अपने अनुकूल बना लेते है और अपने साथ-साथ औरों को भी सुरक्षित कर देते हैं। इसलिए समय का सदुपयोग करने में ही समझदारी है।
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Sia ? 6 years, 6 months ago
Important methods used for preserving food are :
Chemical Method : Salts and edible are the common chemicals generally used to check the growth of microorganisms. Therefore they are called preservations. We add salt or acid preservatives to pickles to prevent the attack of microbes. Sodium benzoate and sodium metabisulphite are common preservatives. These are also used in the jams and squashes to check their spoilage.
Preservation by Salt : Common salt has been used to preserve meat and fish ages. Meat and fish are covered with dry salt to check the growth of bacteria. Salting is also used to preserve amla, raw mangoes, tamarind etc.
Preservation by sugar : Jams, jellies and squashes are preserved by sugar. Sugar reduces the moisture content which inhibits the growth of food spoiling bacteria.
Preservation by Oil and Vinegar : Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment. Vegetables, fruits, fish and meat are often preserved by this method.
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