D. Ceca 48. Which of the following is false about general characteristics of concentrates? A. It has low nitrogen-free extract B. It is a balanced diet C. It has low in crude fiber (less than 18% D. It has high total digestible nutrients 49. Select below the false statement about late stage of maturity: A. Lignin content decreases B. Digestibility decreases C. Low protein content D. Low energy content 50. A system of mating where each male has equal opportunity of mating with any female in A. Selective mating B. Tandem mating C. Random mating D. Inbreeding

48. The correct answer is B. It is a balanced diet.<br /><br />Concentrates are typically high in energy and protein but do not provide a balanced diet on their own. They are often used in animal feeds to provide energy and protein, but they need to be complemented with other ingredients to ensure a balanced diet.<br /><br />49. The correct answer is A. Lignin content decreases.<br /><br />In the late stage of maturity, lignin content actually increases, not decreases. Lignin is a complex organic polymer that is not digestible by animals. As plants mature, the lignin content in their cell walls increases, making the plant material less digestible.<br /><br />50. The correct answer is C. Random mating.<br /><br />Random mating is a system of mating where each male has an equal opportunity of mating with any female. In this system, there is no selective mating based on specific traits or characteristics.