When a woman is in her period and a man does not bring out sperms and they have sex ,will the woman get pregnant

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

Which represents a negative impact of technology

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?