Wrinkling in old age is due to
1). Collagen
2). Myosin
3). Keratin
4). Actin
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1. Which one of the following determines the sharpness of image in a camera ?
2. Water gas is the mixture of
3. If a respiratory surface dries out, gas exchange will
4. Mammary glands are modified
6. Which one of these is a kind of tissue?
7. Rusting of iron takes place due to