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The discovery of the first true antibiotic—penicillin—in 1928 was one of the most life-changing events of the 20th century. Before its discovery, when bacterial infections DEVELOPED, there wasn’t much doctors could do. PEOPLE died from illnesses and injuries that are highly curable today. Now, there are more than 100 antibiotics to fight the war against bacterial infections. Here is a look at COMMON antibiotic names and the types of antibiotics your DOCTOR may prescribe.

tion:Examples of ReductionThe copper ion undergoes reduction by gaining electrons to form copper. The magnesium undergoes oxidation by losing electrons to form the 2+ CATION. Or, you can view it as magnesium reducing the copper(II) IONS by DONATING electrons. Magnesium ACTS as a reducing agent

tion:BALANCED CHEMICAL equation for aluminium + copper chloride----> aluminium chloride + copper 2Al(s) + 3CuCl2(aq) → 2AlCl3 (aq) + 3Cu(s)

Herbivores are animals that eat plants. TWO special CHARACTERISTICS of herbivores are as follows. Herbivores such as cows and goats have wide, blunt TEETH that are suitable for PULLING out plants from the GROUND and grinding them.

olo SHEEP is NAMED after FAMOUS explorer from the 13th century who described meat and horns of these sheep in his book. Number of Marco Polo sheep in the wild is decreasing due to commercial hunt. Marco Polo sheep is listed as near threatened, which MEANS that it can BECOME endangered in the near future.

All subspecies are considered endangered to CRITICALLY endangered. HABITAT loss, overhunting for meat and trophies, and COMPETITION from livestock are the main causes of its decline. The markhor stands about 95–102 cm (37–40 inches) at the shoulder and has long (up to 160 cm [63 inches]) corkscrew-shaped HORNS.

Corrosion is a natural process that CONVERTS a REFINED metal into a more chemically stable form such as oxide, hydroxide, carbonate or SULFIDE. It is the gradual DESTRUCTION of materials by CHEMICAL and/or electrochemical reaction with their environment.

The KINETIC energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to ACCELERATE a body of a given mass from rest to its stated VELOCITY. CONSIDER a body of mass "m" starts moving from rest. After a time interval "t" its velocity BECOMES V.

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izes two graduated scales: a main scale similar to that on a ruler and an ESPECIALLY graduated AUXILIARY scale, the VERNIER, that slides PARALLEL to the main scale and enables readings to be made to a FRACTION of a division on the main scale.

ellectual and practical activity ENCOMPASSING the SYSTEMATIC study of the structure and BEHAVIOUR of the PHYSICAL and natural world through observation and experiment.

✴ Reflection of sound is used to measure the distance and speed of underwater OBJECTS. This METHOD is known as SONAR. ✴ Working of a stethoscope is also based on reflection of sound. In a stethoscope, the sound of the patient's heartbeat REACHES the doctor's ear by MULTIPLE reflections of sound.

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Explanation:Some Important tips to solve Unseen Passages for Class 8 Question and Answers   Read the passage carefully and try to understand the contents. Try to understand the meaning of every word in context to the passage. After reading the passage thoroughly, turn to the questions that follow. Try to find the answers. Check your answers before writing them. Answer should be in the same tense, in which the question is given. Answer the questions on the basis of the information given in the passage. Do not add your own views, expressions and imagination. Try to answer the questions in your own words but strictly to the point and as briefly as possible. We See that every answer is CLEAR and complete in itself. Revise your-answers carefully to avoid any mistake. Most importantly time management should be followed. Type – I Unseen Passage for Class 8 – Passage 1 Read the passage given-below and answer the questions that follow:                                                                             5 The culture of nuclear families is in fashion. Parents are often heard complaining about the difficulties in bringing up children these days. Too much of freedom in demand, too much independence; over night parties; excessive extravagance, SPLURGING pocket money; no time for studies and family all this is a common cry of such families. Aren’t parents, themselves, responsible for this pitiful state ? The basic need of a growing youth is the family, love, attention and bonding along with moral values. One should not forget that ‘charity begins at home’.  Independence and individuality both need to be respected, in order to maintain the sanctity of family. Children, TODAY are to be handled with tact in order to bridge the ever widening generation gap. Only the reasonable demands need to be fulfilled, as there are too many expenses to be met and top many social OBLIGATIONS to be taken care of by the parents. Our forefathers lived happily in joint families. Children loved to live with their cousins, learnt to adjust within means. There was PERFECT harmony between the generations. There never existed the concept of old-age homes. There was deep respect for the family elders and love, care and concern for the youngsters. Even the minor family differences were solved amicably. Unseen Passage with Question and Answers Questions: Mention any two major common concerns of a nuclear family.             (1 x 5 = 5 Marks) Who, according to the passage, are responsible for them ? Explain the expression ‘charity begins at home’. Describe the atmosphere in joint families. Which word in the passage means ‘Holiness of life’ ? Answers: Too much independence and no time for studies and family. Parents themselves. The parent should not forget that it is in giving that one receives. In joint families, children get a friendly atmosphere and they also learn to adjust within means. Sanctity Unseen Passage for Class 8 – Passage 2 Read the passage given below and answer the questions that follow.                                                                             5 When we enter New York harbour, the first thing we see is the Statue of Liberty. What impresses us the most is its size and magnificence. Have you ever wondered how it came to be there ? The Statue of Liberty was a gift from the people of France to mark the one hundred year anniversary of American Independence. In 1869, sculptor Frederic Auguste Bartholdi began to plan his concept for the monument.  Bartholdi chose the look of classic Greek and Roman figures. He envisioned Liberty as a strong and proud figure, one who personified not only the majestic Greek goddesses of the past, but also the working men and women of the present. Finally, in 1884, the work was finished, and Liberty was packed into 214 crates and sent to New York city. Only one problem stood in the way. While the French had raised a lot of funds to build the statue, New York had not secured the funds to build its foundation. It was not until a New York newspaper implored people for donations that money became available. Finally, on 28th October 1886, Americans celebrated the unveiling of the Statue of Liberty.

A naturally occurring, homogeneous inorganic SOLID substance having a definite chemical composition and characteristic crystalline STRUCTURE, color, and hardness. An inorganic element, such as calcium, iron, potassium, sodium, or zinc, that is essential to the NUTRITION of humans, animals, and plants.hello ,FRIEND hope it HELPS you ❣️

DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, GUANINE, CYTOSINE, and thymine. Two of the bases, adenine and guanine, have a double-ring structure CHARACTERISTIC of a TYPE of chemical called a purineIn turn, each nucleotide is itself made up of three primary COMPONENTS: a nitrogen-containing region known as a nitrogenous base, a carbon-based sugar molecule called deoxyribose, and a phosphorus-containing region known as a phosphate group attached to the sugar moleculeExplanation:please mark me as brainliest

A large variety of musical INSTRUMENTS are used to accompany this dance form like the PAKHAWAJ, DHOLAK, JHANJHAR, harmonium and sarangi. However, the characteristic musical instrument of the dance is the pungi or been.Explanation:hope ITZ helps u no spam pls

d) Calcinationis the CORRECT ANSWER..

ilament of electric bulb is MADE up of Tungsten wire because the wire has low melting POINT and has high TENSILE strength out of all other METALS.

tion:DNA meansDeoxyribonucleic acid DNA PRESENT in our BODY it is help to FIND the GRAND FATHERS that is use to test the blood test your blood group

Science is the pursuit and application of knowledge and understanding of the natural and social world FOLLOWING a systematic METHODOLOGY BASED on evidence. ... Evidence. EXPERIMENT and/or observation as benchmarks for testing hypothesesExplanation:thank you have a great day ✌

some examples of good MICROORGANISMS lactobacillus ,yeast, molds. lactobacillus is used for making YOGHURT and curd. yeast is used to make bread wine. MOULDS are used in the FERMENTATION of certain cheese.Explanation:Microbial diversity is truly staggering, yet all these microbes can be grouped into five major types: VIRUSES, Bacteria, Archaea, Fungi, and Protists.

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...THE ANSWER IS d. ALGAE

The ANSWER will be d) all of the above

are INCORRECT...but the ANSWER is rhizome.I HOPE it HELPS U

The primary difference betweenthe two is that Thermoset is a material that STRENGTHENS when HEATED, but cannot be remolded or heated after the initial forming, while thermoplastics can be reheated, remolded, and cooled as NECESSARY WITHOUT causing any CHEMICAL changes

don't know if you have any QUESTIONS or need any further information please CONTACT me at the FOLLOWING blanks with SUITABLE verbs from the following blanks with suitable verbs from the following blanks with suitable verbs from the following

tion:Active absorption. Active absorption REFERS to the absorption of water by roots with the HELP of adenosine triphosphate, generated by the root respiration: as the root CELLS ACTIVELY take part in the process, it is CALLED active absorption.

an get spoilt if they are not kept clean.As RESULT it make your TEETH healthy and keep major problem for long years. It is SUGGESTED to make use of right tooth PASTE and brush to clean without meeting any RISK of it.

Reaction of PLASTER of PARIS and waterThe chemical equation for the reaction of Plaster of Paris and WATER can be REPRESENTED asCaSO4.1/2H2O + 3/2H2O → CaSO4.2H2O