Coal is not a mineral because it is organic, and minerals are inorganic.<span> It forms over millions of years from the compressed, heated remains of dead plants and animals.</span>
d. most single-celled eukaryotes. These organisms have only one cell, but just like other eukaryotes, contain a well-developed nucleus. Single-celled eukaryotes fall under fungi and protista.
In any food chain, the percentage of energy passed from one level to another usually reduced by a factor of 10%.
In the food chain given in the question, we are told that the rabbit ate grass and the hawk ate the rabbit.
The grass carried out photosynthesis and obtained 100% energy from the sun. When the rabbit ate the grass, he obtained 10% of the energy from the grass, thus, the quantity of energy it gained from eating the grass is 10%, that is, 100/10 = 10%.
When the hawk ate the rabbit, it was only able to get 10% of the energy in the rabbit, thus, the quantity of the energy it gained is 1%, that is 10/10 = 1%.
Therefore, 1% of the energy stored by the grass is passed on to the hawk.
When someone contorted their face in disgust over a foul smell, frowns, widens their nose, stretches their mouth a little, seems to shrink the face, and close his eyes a little, for a few seconds the face changes completely obtaining an appearance of someone older.
