4b) visual observations as the sample is brought near the side of the flame, in the flame, and out of the flame, 4c) odor as the fibres burn, 4d) characteristics of the ash including the colour and texture. 4e) The man-made fibers will decompose and melt. much quicker than either the animal or vegetable fibers.
Bluefin tuna swim in a holding pen in Australia. A conservation group has named three fish species that it says are at risk of extinction. The fish are threatened because of overfishing to meet the worldâs growing demand for food.
Some species of stingrays are endangered due to pollution and  overfishing. Some species of stingray that are endangered are the  Ganges Stingray, Giant Freshwater Stingray, â¦ Izu Stingray, and the  Marbled Freshwater Stingray.Answered. In Care of Turtles.ome species of stingrays are endangered due to pollution and  overfishing. Some species of stingray that are endangered are the  Ganges Stingray, Giant Freshwater Stingray, â¦ Izu Stingray, and the  Marbled Freshwater Stingray. Answered.