Answer: premaxilla bone (or maxilla) and the maxillary beak (or rhinotheca).
Explanation:
The beak is composed of keratin, the same tough, insoluble protein found in fingernails, hoofs, antlers and horns. A bird's bill comprises two parts. The upper portion of a bird's bill is called the maxillary rostrum, which consists of the premaxilla bone (or maxilla) and the maxillary beak (or rhinotheca).
Answer:a structure composed of a number of tissues that work together to perform a specific task
Explanation:
Melanosis is any condition of unusual deposits of black pigment in body tissues or organs. Therefore, your correct answer would be letter choice A provided.
Answer: Uracil Pairs with Adenine
Explanation:
Uracil is like the thymine from RNA
