Q.1 What is meant by protoplasm? Who coined the term protoplasm?
Q2 Which organelles are called (a) powerhouse of the cell (b) suicidal bags
Q.3 Draw a well labelled diagram of plant cell. Write function of Vacuole (b) Plastid
Q.4Explain in brief what happens when
(a) Dry apricots are left for some time in pure water and later transferred to sugar solution.
(b) Golgi apparatus is removed from the cell.
Q.5How are simple permanent tissues different from complex permanent tissues in plants ?
Q.6Differentiate between parenchyma, collenchyma and schlerenchyma
Q.7 State the difference between outer layer of branch of a tree and outer layer of a young plant stem
Q.8 Write the modes by which insects affect the crop yield.
Q.9 Differentiate between mixed cropping and inter cropping.
Q.10Explain giving reasons:
a. Balanced diet is necessary for maintaining healthy body
b. Our surrounding area should be free of stagnant water.
Q.11 Name any two groups of microbes from which antibiotics can be extracted.
Q.12 Name any two diseases caused by protozoans. Differentiate between infectious and non
infectious diseases. Q.13 What do you mean by disease symptoms? Explain giving two examples.
Q.14Why dies water need conservation even though large oceans surround the land masses?
PSQ
Q.15 There is mass mortality of fishes in a pond. What may be the reason?
What effective measures you will suggest to the locals to prevent pollution of local water bodies.
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Answer:
The word "protoplasm" comes from the Greek protos for first, and plasma for thing formed, and was originally used in religious contexts. It was used in 1839 by J. E. Purkinje for the material of the animal embryo 2 Lysosomes are small sac-like structures surrounded by a single membrane and containing strong digestive enzymes. The lysosome is also known as a suicide bag of the cell.
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