A Reflectional Symmetry is a type of symmetry in which one half of the object is the mirror image of the other. 1  A figure may have both horizontal and vertical lines of reflection. 2  The alphabet V has reflectional symmetry about a vertical line of reflection.  The hexagon has reflectional symmetry about both horizontal and vertical lines of reflection.
RENAL REGULATION OF BICARBONATE. The kidneys regulate the [HC03-] by. 1) conserving or excreting the HC0 3 - present in the glomerular ultrafiltrate; 2) producing new HCO3- which enters the body fluids as the kidneys excrete ammonium salts and titratable acids (this sum is called net acid) in the urine.
crust to stretch and crack apart Rift Valley Continued divergence leads to: 1) Widening of rift valley 2) Formation of mid-ocean ridge! A Rifting Continent The Great Rift Valley of Eastern Africa. Volcanism occurs in the rift valley. Convergent Plate Boundaries How do the plates move? Convergence leads to destruction of ocean crust!