Answer: phenylketonuria is caused by a deficiency of phenylalanine hydroxylase
Explanation: deficiency of Phenylalanine hydroxylase leads to inability of amino acid phenylalanine to be converted to amino acid Tyrosine. Deficiency of phenylalanine hydroxylase is caused by mutation in the genes that code for phenylalanine hydroxylase
Varieties a number or collection or any of various groups of animals ranking below a species
Breeds a group of animals for reproduction by means of sexual process
Wall lizard are not seen because blood becomes cold inside the body.
Answer:
<em>the seasons in the northern hemisphere are the opposite of those in the southern hemisphere </em>