2. Which is the structural and functional unit of the kidney?
4. What is the audible frequency range for humans?
3. The region around a magnet where its effect can be felt is called?
5. What is the chemical formula of rust?
6. What is the chemical formula of washing soda?
SECTION-B
Q.5 What are the special characters of mammals? Name two egg-laying animal
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2.nephrone
4.20 Hz to 20kHz
3.pole
q5. mamals are viviparous, are milked by their mother
egg laying animals - frog, hen, lizard etc
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