IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Which of these is an example of negative feedback? 1667 05b5cc62ce4d2b4197774b93e
5b5cc62ce4d2b4197774b93e- 1After you eat, insulin stimulates the lowering of blood sugar levels.true
- 2Once labor begins, contractions increase in frequency and intensity.false
- 3After you eat, glucagon stimulates an increase in blood sugar levels.false
- 4As a blood clot begins to form, the process of its formation gets faster and faster.false
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उत्तर : 1. "After you eat, insulin stimulates the lowering of blood sugar levels."
व्याख्या :
Answer: A) After you eat, insulin stimulates the lowering of blood sugar levels. Explanation: Eating raises blood sugar levels, insulin stimulates the lowering of blood sugar level. In this example the response to the stimulus (increased blood sugar levels) opposes that stimulus (by lowering blood sugar levels).
प्र: Which of these was a political goal for farmers? 7397 05b5cc62ce4d2b4197774b938
5b5cc62ce4d2b4197774b938- 1lower prices for grain storagetrue
- 2higher prices for machineryfalse
- 3lower prices for foreign goodsfalse
- 4higher prices for shippingfalse
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उत्तर : 1. "lower prices for grain storage"
व्याख्या :
Answer: A) lower prices for grain storage Explanation:
प्र: Which statement best describes the electronegativity of an element? 1948 05b5cc62ce4d2b4197774b92e
5b5cc62ce4d2b4197774b92e- 1Electronegativity of an atom is it's ability to produce energy while losing an electron.false
- 2Electronegativity of an atom is it's ability to attract electrons during bond formation.true
- 3Electronegativity of an atom is it's ability to lose electrons during cation formation.false
- 4Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.false
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उत्तर : 2. "Electronegativity of an atom is it's ability to attract electrons during bond formation."
व्याख्या :
Answer: B) Electronegativity of an atom is it's ability to attract electrons during bond formation. Explanation: Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.
प्र: How long is a term in the house of representatives? 1032 05b5cc62ce4d2b4197774b933
5b5cc62ce4d2b4197774b933- 15false
- 22true
- 34false
- 46false
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उत्तर : 2. "2"
व्याख्या :
Answer: B) 2 Explanation: Members of the House of Representatives serve two-year terms and are considered for reelection every even year.
प्र: What organelle is responsible for photosynthesis? 1045 05b5cc62ce4d2b4197774b929
5b5cc62ce4d2b4197774b929- 1mitochondriafalse
- 2Cytoplasmfalse
- 3Chloroplaststrue
- 4Ribosomesfalse
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उत्तर : 3. "Chloroplasts"
व्याख्या :
Answer: C) Chloroplasts Explanation: Chloroplasts are organelles in plant and bacteria cells that contain the chlorophyll is responsible for photosynthesis.
प्र: What was a major contribution of John Muir? 1149 05b5cc62ce4d2b4197774b91c
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उत्तर :
व्याख्या :
John Muir encouraged the establishment of various parks in the United States' National Park System, including the Yosemite and Sequoia National Parks.
प्र: Which animal adaptation happened before the others? 1559 05b5cc62ce4d2b4197774b91d
5b5cc62ce4d2b4197774b91d- 1Reproduction on landfalse
- 2Development of a colelomfalse
- 3Tissue developmenttrue
- 4Deuterostome developmentfalse
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उत्तर : 3. "Tissue development"
व्याख्या :
Answer: C) Tissue development Explanation:
प्र: Which country shares the longest border with China? 1479 05b5cc62ce4d2b4197774b917
5b5cc62ce4d2b4197774b917- 1Indiafalse
- 2Russiafalse
- 3Mongoliatrue
- 4Kazakhstanfalse
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उत्तर : 3. "Mongolia"
व्याख्या :
Answer: C) Mongolia Explanation: China shares land borders with 14 different countries, the longest being with Mongolia followed by Russia and then India.