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. Much of the silicon and oxygen in the Earthâs crust is present as the compound silicon dioxide also known as silica.Silicon dioxide has a giant covalent structure.Part of this structure is shown in the diagram-oxygen atoms are shown as red, silicon atoms shown as brown:ilicon dioxide has a giant covalent structure. Part of this structure is shown in the diagram-oxygen atoms are shown as red, silicon atoms shown as brown: