How does the climate change that scientist are observing now compare with climate change in the past?

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

What makes a dominant allele different from a recessive allele

The carrier molecules of the electron transport system are located in the