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प्रश्न
Read the following passage and complete the activities:
A1. Complete the chart on the life stages of fireflies: (2)
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Fireflies are beetles and go through several life stages, starting out as an egg, then hatching into larvae. At the juvenile stage, they turn into pupae and then, finally adults. Fireflies spend most of their lives in a larval stage, hidden away. There are 2000 different species of fireflies. But they all go through a long juvenile stage and a short adult life, which is mainly about courtship, mating and reproduction. The juveniles living underground or underwater, are very different though-they're hunters, they eat snails and soft-bodied insects and they have very different habitats. Conserving them is essential for human life as fireflies are a key part of the food web. They are predators of agricultural pests. In turn, they are prey for spiders and other insects. They are completely enmeshed in the web of life. In addition, about 70 years ago, scientists unravelled the mystery of fireflies' light-producing talents. Since then, the bio-chemical reactions that fireflies experience have been used in detecting bacterial contamination in foods, testing drugs against cancer, developing drought-resistant crops. They have been used in space exploration. So fireflies give us beauty and inventions. Fireflies carry oxygen, calcium, magnesium and a natural chemical called luciferin. These react together to produce the photons. This is how the fireflies glow. Firefly tourism is growing across the world. In Maharashtra, for example, a particular species monsoon fireflies, emerge before the rains. They're beautiful and a festival is held in Purushwadi, encouraging firefly tourism. Its wonderful that people around the world go to see fireflies in their natural habitat. We need to be cautious. Too many people can disturb adult and larval habitats. Fireflies need darkness to communicate with each other and we need fireflies because they are harbingers of hope. |
A2. Write two reasons for the conservation of fireflies. (2)
A3. Make antonyms of the following words using prefix: (2)
- different × ______
- experience × ______
- bacterial × ______
- natural × ______
A4. Do as directed: (2)
(i) Too many people can disturb adult and larval habitat.
(Rewrite using 'as well as')
(ii) These react together to produce photons.
(Pick out the infinitive from the given sentence)
A5. Can you think of any other insect that teaches us some values of life? Explain with examples. (2)
उत्तर
A1.
A2. Fireflies are preserved because the biochemical processes they go through are important for detecting bacterial contamination in food and testing anti-cancer medications, among other things. Oxygen, calcium, magnesium, and luciferin are also carried by fireflies.
A3.
- different × indifferent
- experience × inexperience
- bacterial × anti-bacterial
- natural × unnatural
A4. (i) Many people can disturb adult as well as larval habitat.
(ii) to produce
A5. Insect pollinators, such as bees, help with propagation and fruit production. They are also pest predators or parasites. Aside from that, they provide honey. Bees work extremely hard. They frequently work themselves to death. This is a source of inspiration for humans. They teach us to never give up, even when the odds are stacked against us.
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संबंधित प्रश्न
The Perfect Dog
In the summer of 1967, when I was ten years old, my father caved into my persistent pleas and took me to get my own dog. Together we drove in the family station wagon far into the Michigan countryside to a farm run by a rough-hewn woman and her ancient mother. The farm produced just one commodity—dogs. Dogs of every imaginable size and shape and age and temperament. They had only two things in common: each was a mongrel of unknown and distinct ancestry, and each was free to a good home.
I quickly decided the older dogs were somebody else’s charity case. I immediately raced to the puppy cage. “You want to pick one that’s not timid,” my father coached. “Try rattling the cage and see which ones aren’t afraid.”
I grabbed the chain-link gate and yanked on it with a loud clang. The dozen or so puppies reeled backward, collapsing on top of one another in a squiggling heap of fur. Just one remained. He was gold with a white blaze on his chest, and he charged at the gate, yapping fearlessly. He jumped up and excitedly licked my fingers through the fencing. It was love at first sight.
I brought him home in a cardboard box and named him Shaun. He was one of those dogs that give dogs a good name. He effortlessly mastered every command I taught him and was naturally well-behaved. I could drop a crust on the floor and he would not touch it until I gave the okay.
Relatives would visit for the weekend and returned home determined to buy a dog of their own, so impressed were they with Shaun – or “Saint Shaun”, as I came to call him. Born with the curse of an uncertain lineage, he was one of the tens of thousands of unwanted dogs in America. Yet by some stroke of almost providential good fortune, he became wanted. He came into my life and I into his – and in the process, he gave me the childhood every kid deserves.
The love affair lasted fourteen years, and by the time he died I was no longer the little boy who had brought him home on that summer day. I was a man, out of college and working across the state in my first real job. Saint Shaun had stayed behind when I moved on. It was where he belonged. My parents, by then retired, called to break the news to me. My mother would later tell me, “In fifty years of marriage, I’ve only seen your father cry twice. The first time was when we lost Mary Ann” – my sister, who was still-born. “The second time was the day Shaun died.”
Saint Shaun of my childhood. He was a perfect dog. At least that’s how I will always remember him. It was Shaun who set the standard by which I would judge all other dogs to come.
(Marley and Me by John Grogan)
1.1 Based on your reading of the passage, complete the following statements.
(a) The dog farm was run by ________________________________.
(b) The author did not want an old dog because ______________________________.
(c) He fell in love with the dog the moment the latter _______________________.
(d) Shaun became so obedient that he ______________________ until the author allowed him.
(e) After visiting them, their relatives wanted ________________________.
(f) When Shaun died even _______________________.
1.2 Find words from the passage which mean the same as the following.
(a) urgent requests (para 1)
(b) falling (para 3)
Read the passage given below and answer the questions that follow:
If you are addicted to coffee, and doctors warn you to quit the habit, don’t worry and just keep relishing the beverage, because it’s not that bad after all! In fact, according to a new study, the steaming cup of Java can beat fruits and vegetables as the primary source of antioxidants. Some studies state that coffee is the number one source of antioxidants in American diet, and both caffeinated and decaf versions appear to provide similar antioxidant levels.
Antioxidants in general have been linked to a number of potential health benefits, including protection against heart diseases and cancer, but Vinson, a dietitian said that their benefits ultimately depend on how they are absorbed and utilized in the body. The research says that coffee outranks popular antioxidant sources like tea, milk, chocolate and cranberries. Of all the foods and beverages studied, dates actually have the most antioxidants based solely on serving size, but since dates are not consumed anywhere near the level of coffee, the drink comes as the top source of antioxidants, Vinson said.
Besides keeping you alert and awake, coffee has been linked to an increasing number of potential health benefits, including protection against liver and colon cancer, type 2 diabetes, and Parkinson’s disease, according to some recently published studies. The researchers, however, advise that one should consume coffee in moderation, because it can make you jittery and cause stomach pains
(a) What do doctors advise us about the habit of drinking coffee?
(b) What are the two versions of coffee that are drunk in America?
(c) State any two benefits of antioxidants.
(d) What does Vinson say about the consumption of antioxidants?
(e) Name any two popular sources of antioxidants.
(f) How does coffee outrank dates in the level of antioxidants?
(g) Mention any two benefits of coffee.
(h) What do researchers warn us about the excessive use of coffee?
Read the passage given below:
People tend to amass possessions, sometimes without being aware of doing so. They can have a delightful surprise when they find something useful which they did not know they owned. Those who never have to change house become indiscriminate collectors of what can only be described as clutter. They leave unwanted objects in drawers, cupboards, and attics for years in the belief that they may one day need them. Old people also accumulate belongings for two other reasons, lack of physical and mental energy, and sentiment. Things owned for a long time are full of associations with the past, perhaps with the relatives who are dead, and so they gradually acquire a sentimental value.
Some things are collected deliberately in an attempt to avoid wastage. Among these are string and brown paper, kept by thrifty people when a parcel has been opened. Collecting small items can be mania. A lady cuts out from newspaper sketches of model clothes that she would like to buy if she had money. As she is not rich, the chances are that she will never be able to afford such purchases. It is a harmless habit, but it litters up her desk.
Collecting as a serious hobby is quite different and has many advantages. It provides relaxation for leisure hours, as just looking at one’s treasure is always a joy. One doesn’t have to go out for amusement as the collection is housed at home. Whatever it consists of - stamps, records, first editions of books, china – there is always something to do in connection with it, from finding the right place for the latest addition to verifying facts in reference books. This hobby educates one not only in the chosen subject but also in general matters which have some bearing on it.
There are other benefits also. One gets to meet like-minded collectors to get advice, compare notes, exchange articles, to show off one’s latest find. So one’s circle of friends grows. Soon the hobby leads to traveling, perhaps a meeting in another town, possibly a trip abroad in search of a rare specimen, for collectors are not confined to one country. Over the years one may well become an authority on one’s hobby and will probably be asked to give informal talks to little gatherings and then, if successful, to larger audiences.
(a) On the basis of your understanding of the above passage make notes on it using headings and sub-headings. Use recognizable abbreviations (wherever necessary-minimum four) and a format you consider suitable. Also, supply an appropriate title to it.
(b) Write a summary of the passage in about 80 words.
Read the following extract and answer the questions given below:
Researchers recently announced the earth could actually withstand up to 200,000 times the current population. They arrived at this figure by calculating the amount of heat a human body emits, and only at 1·3 million billion would the earth be too hot to be habitable. And though it would feel like being ina can of sardines if that figure were ever reached, the earth is capable of comfortably sustaining a population several times the current 6·5 billion.
In fact, fertility is actually on the decline worldwide. Though the population has grown, the rate of growth has fallen sharply. Twenty years ago, the UN projected that the population would reach 11·I6 billion in 2050, today they say it will reach only 9·3 billion. Moreover, the human population will stabilize at about 11·5 billion. While this figure is almost twice the current one, it is hardly claustrophobic.
True, the demands on resources are heavy even now, but this is more due to the manner in which these resources are being used. In fact, figures show that a bigger population does not amount to greater consumption. Over 20% of the world's people in the highest-income countries account for 86% of total private consumption expenditure - the poorest 20% a tiny 1·3%. With just 5% of the world's population, the US consumes about 40% of the world's resources. Would you say the US is overpopulated?
Concerns on the scarcity of food are equally baseless. In fact, global food production has actually kept up with population growth. If people starve in many countries it is not because food is becoming scarce; it is because those people cannot afford it.
Questions:
(1) What conclusions did the researchers arrive at?
(2) How does the writer explain that fertility is on the decline?
(3) What does the extract predict about the fear of scarcity of food?
(4) How will the population become a gift in the global market scene?
(5) Rewrite the following sentences in the ways instructed:
(i) The earth could withstand up to 200,000 times the current population.
(Rewrite the sentence using the modal auxiliary showing 'certainty'.)
(ii) The earth would be too hot to be habitable.
(Remove 'too' and rewrite the sentence.)
(iii) These resources are being used.
(Rewrite the sentence beginning with, 'We ........... .')
(6) Write the antonyms of:
(i) habitable
(ii) stabilize
Read the following extract and answer the questions given below.
| A | B |
| (i) valedictorian | (a) feeling of annoyance |
| (ii) frustration | (b) dunce |
| (c) school topper | |
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(d) validity
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Read the following passage and do the activities.
Galaxies are vast clusters of thousands of millions of stars, planets, gases and dust, which are held together by gravity. There are over one thousand million galaxies, and each is a very long way from its nearest neighbour.
Galaxies were formed during the Big Bang explosion about 15,000 million years ago. When this phenomenon occurred, everything that was in the universe flew out in different directions. Scientists believe that the galaxies were formed from lumps of matter that resulted. However, the process is nowhere near complete. The universe is still expanding, galaxies are still moving away from each other, new stars are still being created.
Galaxies are classified according to their shapes. There are three main types. The most common type of galaxy is The Spiral. This has several spiral arms radiating out from the center. Spiral galaxies have a large cluster of stars in their nucleus. The second type is the Barred spiral. In this type of galaxy, the spiral arms curve away from the opposite ends of a sort of bar going through the middle of the nucleus. These contain large amounts of gas and dust as well stars. The third type of galaxy is electrical. These consist almost entirely of stars and contain very little gas or dust. Some galaxies have irregular, uneven shapes and cannot be classified.
(A1) State whether the following statements are true or false. 02
(1) The most common type of galaxy is the barred spiral.
(2) Galaxies are clusters, held by gravity.
(3) Scientists do not believe in the Big Bang explosion.
(4) Galaxies are moving from each other.
(A2) Complete the web chart. 02
(A3)
(a) Find out similar words from the passage. 01
(i) mass (ii) happenings
(b) Give the verb form of the given words. 01
(i) classified (ii) directions
(A4) Identify and name the clause. 02
Scientists believe that the galaxies were formed from the lumps of matter.
(A5) Can there be life in another galaxy? Give reasons for your answer. 02
(B) Read the passage given in Q. 4 (A) and write the summary of it. Suggest a suitable title to your summary. (05)
Read the following extract and answer the questions given below:
Researchers recently announced the earth could actually withstand up to 200,000 times the current population. They arrived at this figure by calculating the amount of heat a human body emits, and only at 1.3 million billion would the earth be too hot to be habitable. And though it would feel like being in a can of sardines if that figure were ever reached, the earth is capable of comfortably sustaining a population several times the current 6.5 billion.
In fact, fertility is actually on the decline worldwide. Though the population has grown, the rate of growth has fallen sharply. Twenty years ago, the UN projected that the population would reach 11.16 billion in 2050, today they say it will reach only 9.3 billion. Moreover, the human population will stabilize at about 11.5 billion. While this figure is almost twice the current one, it is hardly claustrophobic.
True, the demands on resources are heavy even now, but this is more due to the manner in which these resources are being used. In fact, figures show that a bigger population does not amount to greater consumption. Over 20% of the world's people in the highest-income countries account for 86% of total private consumption expenditure - the poorest 20% a tiny 1.3%. With just 5% of the world's population, the US consumes about 40% of the world's resources. Would you say the US is overpopulated?
Concerns on the scarcity of food are equally baseless. In fact, global food production has actually kept up with population growth.
(1) What is the main idea of the first paragraph?
(2) What is the relationship between the population and the available resources?
(3) Why do the researchers claim that the earth is capable of sustaining a bigger population?
(4) What, according to you, are the problems caused by the increasing population?
(5) Rewrite the following sentences in the ways instructed :
(i) The earth would be too hot to be habitable. (Remove 'too'.)
(ii) Though the population has grown, the rate of growth has fallen sharply. (Rewrite it using 'but')
(iii) Moreover, the human population will stabilize at about 11.5 billion. (Make it 'less definite'.)
(6) Find out the words from the extract which mean :
(i) natural capacity to produce (ii) shortage
Read the following extract and answer the questions given below :
But being named an 'AdarshGaon · is far from easy. Villages had to give a proposal after Which a committee headed by Mr. Pawar inspected the villages. "The villages had to show dedication in the struggle to fight mediocrity. They had to follow all the conditions of becoming an 'AdarshGaon '. We chose villages with a revolutionary spark." Mr. Pawar says.
Villages need to follow strict rules. The process begins with effective water managc1nent through the watershed technique and Water auditing. taking responsibility for the village's natural resources -phmting trees and stopping grazing, contributing labour for the village Work, and then expanding to bring about behavioral changes in the people for harbouring social change. Hiware Bazaar is free of any kind of addiction and there are no liquor or tobacco shops in the village. Vasectomy has been made co1npulsory. as is the pre-marital HIV test.
The 'AdarshGaon · n1odcl prides itself of being based on the joint decisions made by the (Gram Sabha, Where all the villagers are present. Even while selecting the new villages under the scheme, Mr. Pawar made sure that the decision to become an ideal village was taken by the entire village together.
The greatest victory for Hiware Bazaar so far has been the reverse migration that the village has witnessed since 1989. As many as 93 families have come back to the village, "from the slums in Mumbai and Pune." Mr. Pawar says.
(1) What features of 'AdarshGaon' are given in this extract?
(2) What is the procedure for selecting 'AdarshGaon'?
(3) What is the greatest victory for Hiware Bazaar?
(4) Do you think all villages in Maharashtra should follow the ideals of Hiware Bazaar? Why?
(5) Rewrite the following sentences in the Ways instructed :
(i) Mr. Pawar inspected the villages.
(Rewrite it using the noun form of the word underlined.)
(ii) Vasectomy has been made compulsory by the villagers.
(Rewrite it beginning with -"The villagers ........ ".)
(iii) There are no liquor or tobacco shops in the village.
(Rewrite it using 'neither ........ nor'.)
(6) Find out the words from the extract which mean :
(i) causing a great change
(ii) the quality of being average
Based on the careful reading of the passage given below, answer any four out of five questions that follow:
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Climate change and global warming are the biggest threats of the present time and how the world manages to control pollution will define our future. Rising industrialization, urbanization, deforestation etc., are endangering the natural ecosystem. Since 1880, the earth’s temperature has been rising at a rate of 0.14° F (0.08° C) per decade and the rate of increase has doubled since 1981 at 0.32° F (0.18° C) per decade. The 10 warmest years on record have occurred since 2015, with 2020 recorded as the second-warmest year as per the National Oceanic and Atmospheric Administration (NOAA). With growing economies, global carbon measurements have been rapidly rising for the last 15 years. As per recent data, in January 2022, carbon dioxide (CO2) measurement stood at 418 parts per million, up around 11% from 378 parts per million recorded since 2007. |
(a) What is the key to defining our future?
- The means employed to control pollution.
- The means employed to control resources.
- The means employed to control state policies.
- The means employed to educate masses.
(b) Which of the following elements are not responsible for endangering natural ecosystem?
- Deforestation
- Inflation
- Industrialization
- Urbanization
(c) According to the passage, economy, and carbon emissions have been ______ to each other for last 15 years.
- Inversely proportionate
- Directly proportionate
- Not related
- Disproportionate
(d) Name the institution responsible for observing and recording earth’s temperature over the years.
- National Organic and Atmospheric Administration
- National Oceanic and Atmospheric Administration
- North Organic and Atmospheric Administration
- National Offshore and Atmospheric Administration
(e) Carbon dioxide measurement stood at ______ parts per million in 2007.
- 387
- 378
- 481
- 418
Read the following passage carefully:
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(1) Rotation of crops is a universal phenomenon which is practised by most of the farmers of the tropical and temperate countries. The main objective of rotation of crops is to obtain higher agricultural returns on the one hand, and to maintain the soil fertility on the other. (2) In other words, the rotation of crops helps in making agriculture more sustainable. The importance of crop rotation is more in the areas where farmers grow two, or more than two crops in the same field in a year. Irrigation facilities have also been appreciably developed in the country during the last three decades. The availability of water to the arable land has helped in the intensification of agriculture. (3) In the areas such as Punjab and Haryana, where the Green Revolution is a big success, one soil exhaustive crop (rice) is followed by another soil exhaustive crop (wheat). Subsequently, the field vacated by wheat is devoted to either rice or maize or cotton. Thus, in one year, the farmers are harvesting three soil exhaustive crops from the same field. Such a rotation of crops may fetch more income to the farmers, but depletes the soil fertility at a faster pace. (4) A number of field studies were conducted to assess the traditional crop rotation pattern. One such field study about the changes in the rotation of crops was conducted in the village Banhera (Tanda), Haridwar district. The main rotation of crops of the village is shown in the table below. |
| Traditional Rotation of Crops (1960-65) in Banhera (Tanda) | ||||
| Year | Kharif (mid-June to mid-October) | Rabi (mid-October mid-April) | Zaid (April to June) | No. of days land left fallow |
| 1960 | Millet/fodder/rice | Gram | Fallow | 90 |
| 1961 | Fallow | Wheat | Fallow | 210 |
| 1962 | Millet/fodder/rice | Gram | Fallow | 90 |
| 1963 | Fallow | Wheat | Fallow | 210 |
| 1964 | Millet mixed with urad/fodder/rice | Gram | Fallow | 90 |
| 1965 | Fallow | Wheat | Fallow | 210 |
Answer the following questions, based on the above passage:
- Fill in the blanks with the appropriate option from those given in brackets, based on your understanding of para 2.
One of the reasons that there has been an intensification of agriculture in the country is the development of irrigation facilities is a/an ______ (fact/opinion) because it is a/an ______ (subjective judgement/objective detail). - Based on your understanding of paras 1 and 2, state whether the following statement is true or false.
If proper irrigation facility is provided, higher agricultural returns can be obtained by making crop rotation more sustainable. - Justify the following in about 40 words.
Crop rotation may fetch more income to the farmers, but depletes the soil fertility at a faster pace. - Based on the table, mention the years when the land was left fallow for maximum number of days.
- The study conducted in village Banhera (Tanda) reflects that during the years 1960 to 1965, from April to June, the land was left fallow or uncultivated throughout. State any one inference that can be drawn from this.
- Select the option that correctly states the significance of crop rotation as given below:
- Crop rotation is done to obtain higher agricultural returns.
- Higher agricultural returns can be obtained by harvesting soil-exhaustive crops.
- Crop rotation demands that land should be left fallow for a few months to increase the fertility of soil.
- Better irrigation facility to the arable land has helped in the intensification of agriculture.
- If crops to be harvested are chosen wisely, crop rotation can help in maintaining fertility of soil.
- (1), (2) and (4)
- (1) only
- (3) and (5)
- (1) and (5)
- Crop rotation is helping in making agriculture more sustainable. Mention one benefit and one drawback of crop rotation. (Answer in about 40 words)
- Which of the following is the main takeaway from the study mentioned in the passage?
- The study needs to include more valid data to support the practice of crop rotation
- Crop rotation is a sustainable practice that can transform the agricultural sector.
- The impact of crop rotation on farmer’s upliftment has been thoroughly explained.
- Crop rotation is independent of the type of crops harvested and availability of water for irrigation.
