1) Why snails mucus is used in cosmetic industries? 2) Why do ducks close one eye when they sleep? 3) Which type of nitrogen wastes do birds produce?
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1) Why snails mucus is used in cosmetic industries?
ANSWER) Somkamol Manchun, the doctor in charge of the purification process, said snail mucus contains collagen and elastin --ingredients that "can make skin firm with less wrinkles". It "triggers the skin cells and helps heal the skin".
2) Why do ducks close one eye when they sleep?
ANSWER) Researchers have found that ducks and other birds sometimes sleep with one eye open. While sleeping with one eye open, one hemisphere of the mallard's brain is awake while the other is sleeping, Rattenborg said. The awake half allowed birds to keep an eye open for predators.
3) Which type of nitrogen wastes do birds produce?
ANSWER) Nitrogenous wastes in the body tend to form toxic ammonia, which must be excreted. Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste.
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