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Reha consumed boiled sweet potatoes and boiled eggs for breakfast. Help her to understand some steps in the process of digestion of the food taken by her by answering the questions given below. B. Which of these food items contains fats? How is it digested? C. Which of these food items is rich in starch? How is its digestion initiated? D. The figure given below represents parts of the human alimentary canal. Which of these parts will have the maximum amount of digested food as soon as the process of digestion is completed?
ANSWR: (b) Eggs contain fats. Bile juice from the liver breaks down large fat globules into smaller ones for increasing the efficiency of the enzymes and making the medium alkaline. Emulsified fats are digested by lipase secreted by pancreas. ANSWER: (c) Sweet potatoes are rich in starch. The salivaRead more
ANSWR: (b) Eggs contain fats. Bile juice from the liver breaks down large fat globules into smaller ones for increasing the efficiency of the enzymes and making the medium alkaline. Emulsified fats are digested by lipase secreted by pancreas.
ANSWER: (c) Sweet potatoes are rich in starch. The saliva secreted by salivary glands present in buccal cavity contain an enzyme called salivary amylase that breaks down starch which is a complex molecule to give sugar.
ANSWER: (d) Small Intestine will have a maximum amount of digested food as the process of digestion is completed in the small intestine.
See lessPuneet wanted to grow banana plants. (i) Based on your knowledge on plant reproduction should he opt for seeds or any alternate method of reproduction. Justify your answer. (ii) Offsprings of a banana plant usually show very little variation. What causes variation and are variations good or bad? Justify.
(i) Puneet should not choose seeds as banana plants have lost the capacity to produce seeds. He should go for vegetative propagation of banana (by stem cutting). (ii) Errors and variations in DNA copying cause variation. Variation is good as it can help a population tide over unfavourable conditionsRead more
(i) Puneet should not choose seeds as banana plants have lost the capacity to produce seeds. He should go for vegetative propagation of banana (by stem cutting). (ii) Errors and variations in DNA copying cause variation. Variation is good as it can help a population tide over unfavourable conditions by survival of some variants. It is bad as parents’ desirable characters are lost/ sometimes variants are not able to survive in the new conditions/ the variant is not able to use the cellular apparatus efficiently.
See lessAnnie was conducting research on the number of fruits produced by watermelon under different conditions. She grew 25 watermelon plants each in both glass house A and B. She introduced pollinators in glass house A only. (i) What difference will she observe in the number of fruits produced in the two glass houses? Explain with reason. (ii) List 3 changes that will occur in a flower once it gets fertilized.
Watermelon has unisexual flowers; the male and female flowers are separate. The presence of pollinators will facilitate cross pollination between the flowers increasing the chance of fertilization and number of fruits being produced. Without pollinators the probability of pollen falling on stigma reRead more
Watermelon has unisexual flowers; the male and female flowers are separate. The presence of pollinators will facilitate cross pollination between the flowers increasing the chance of fertilization and number of fruits being produced. Without pollinators the probability of pollen falling on stigma reduces in a unisexual flower, especially if they are far apart thus the number of fruits produced will be less. (ii) The three changes observed are: ● Ovule develops a tough coat and becomes seed. ● Ovary grows and ripens to form fruit. ● Petals, sepals, stamen, style and stigma may shrivel and fall off.
See lessIn Britain the formation of the nation-state was not the result of a sudden upheaval or revolution but was the result of a long-drawn-out process.’ Analyse this statement with suitable reasons.
The creation of the British nation-state was a gradual process, not caused by any sudden revolution. People living in the British Isles mainly identified themselves by ethnicity — as English, Scottish, Welsh, or Irish. The Act of Union (1707) between England and Scotland led to the birth of the UnitRead more
- The creation of the British nation-state was a gradual process, not caused by any sudden revolution. People living in the British Isles mainly identified themselves by ethnicity — as English, Scottish, Welsh, or Irish.
- The Act of Union (1707) between England and Scotland led to the birth of the United Kingdom of Great Britain. This allowed England to dominate Scotland, suppressing its native culture and independent political institutions.
- In the Scottish Highlands, people were banned from speaking Gaelic or wearing traditional dress. Many were also evicted from their ancestral lands under English control.
- England supported Irish Protestants in maintaining power over the Catholic majority. Rebellions by Irish Catholics were crushed, and in 1801, Ireland was forcibly merged into the United Kingdom.
- Symbols of British identity — like the national flag, anthem, and English language — were promoted across the Isles, while older nations such as Scotland, Wales, and Ireland were reduced to secondary partners in the union.
See lessSalt March became an effective tool of resistance against colonialism. Analyse the statement with suitable reasons.
Salt became a symbol of unity and defiance because it was an essential commodity used by all, rich or poor. Gandhiji chose it to represent equality and to protest the unjust salt tax imposed by the British government. Gandhiji’s letter to Viceroy Irwin, listing eleven demands, emphasized the abolitiRead more
Salt became a symbol of unity and defiance because it was an essential commodity used by all, rich or poor. Gandhiji chose it to represent equality and to protest the unjust salt tax imposed by the British government.
Gandhiji’s letter to Viceroy Irwin, listing eleven demands, emphasized the abolition of the salt tax as most significant. When the demand was ignored, he launched the historic Dandi March, inspiring nationwide participation and strengthening nationalist sentiment.
The Salt March spread across India, with people manufacturing salt, boycotting British goods, refusing taxes, and picketing liquor shops. This mass civil disobedience united Indians across regions and classes against colonial rule.
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