1. Civil Engineering Dept., College of Engineering, Univ. of Mosul, Mosul, Iraq (corresponding author).
2. Dept. of Biology, Wilfrid Laurier Univ., 75 Univ. Ave. West, Waterloo, ON, Canada N2L 3C5.
3. Dept. of Biological Sciences, Univ. of North Texas, Institute of Applied Sciences, 1155 Union Circle 310559, Denton, TX 76203-5017.