Test tube babies are a babies conceived by in vitro fertilization.
in virto fertilization is a process by which an egg is fertilised by sperm outside the body.
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The correct answer is (b) arctic fox
The arctic fox shows two color of fur depending upon the season. During summer and spring season the fox has dark colored coat .It does so to match the color of the brown dirt in the surrounding. In winter's the arctic fox turns its fur to white to match the color of the snow in the surrounding. This phenomenon is known as " camouflage". Animals have developed this adaptation to protect itself from being killed by other animals by changing the color of the fur according to the color of the surrounding.
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Answer:
Collagen
Explanation:
Vitamic C or ascorbic acid acts as a cofactor in the process of collagen synthesis. It has been shown that lack of vitamin C leads to the impaired collagen synthesis. Beside that activity, vitamin C has many other funtions within organism:
- antioxidant
- cofactor in other enzymes
- involved in wound healing (repair of tissue)
- involved in the production of some neurotransmitters...
