Question
Write down two main functions of:
- Endoplasmic reticulum.
- Lysosome.
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Write down names of different types of plant tissues.
Name three occupational diseases caused due to air pollution. Also mention their causative factors.
List one function for each of following: osteoblast, chondroblast, goblet cell, neuron, muscle cell.
Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
Give four general characters of phylum Mollusca. Write down two examples.
Find the momentum of a body of mass 100g having a kinetic energy of 20J.