A cell containing 40 chromatids at the beginning of meiosis would, at its completion, produce cells containing how many chromosomes?

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

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

In which situations is the principle of cross-cutting relationship useful in determining relative age?