Question

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Weekend assignment for 8th std students. Sub:Science. Answer the following briefly. 1) Why do we use gold and silver for making jewellery? 2) Explain why bells are made of metals or their alloys but not of wood? 3) Why do we polish metals to bring back their shine? 4) Why are wires made of metals like aluminium or copper and not of carbon or Sulphur? 5) Silver is used to very thin foils which are used to decorate sweets. explain. **********************​

Answer 1

Answer:

Simple tissues Complex tissues

They are composed of one type of cells only These tissues are composed of more than one type of cell

Cells of this tissue carry out the same function Cells of this tissue can carry out different functions

Example – Parenchyma, collenchyma, sclerenchyma Example – Phloem and xylem

Explanation:

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Answer 2

Explanation:

Food poisoning, also called foodborne illness, is illness caused by eating contaminated food. Infectious organisms — including bacteria, viruses and parasites — or their toxins are the most common causes of food poisoning.