what adaptations facilitated movement of tetrapods to land - be sure to describe challenges that these adaptations helped them overcome.

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

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.