PRRS exists in two distinct forms, reproductive and respiratory, and infected farms may experience one or both. A variety of factors, including swine genetics, the specific PRRS virus variants in the herd, health status of the herd, ages of the animals involved, and pregnancy status, may influence the clinical signs.
8495 Karma. 1. Silicon is a metal and oxygen is a non metal hence it will form both ionic and covalent bonds, pauling principle explains the ratio in detail.Was this answer helpful?495 Karma. 1. Silicon is a metal and oxygen is a non metal hence it will form both ionic and covalent bonds, pauling principle explains the ratio in detail.
Silicon dioxide, or silica, is a. polymeric solid with a three-dimensional network of silicon atoms bound in a tetrahedral. structure to four oxygen atoms, each of which are bound in turn to two silicon atoms. (Figure 13.1). In silicate minerals, this network is rearranged to accommodate other. metal oxides.