Question
Write any three applications (or use) of ultrasound.
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Write notes on plants and animals as sources of food.
What is sclerenchyma? Describe location, structure and economic importance of this tissue.
Define diarrhoea. Give an account of occurrence, symptoms, prevention and control of this ailment.
Write down four main characters of Nematoda. Give two examples.

What are differences between the following:
Cartilaginous fishes and bony fishes.
What is osmosis?