Many animals have internal or external structures that provide support. which structure found in plant cells play a similar role? a. cell wall b. chloroplast c. cytoplasm d. cell membrane

Which are forms of nitrogen that are usable by humans

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

Ineed the answer asap. in order to be considered alive, an organism must simultaneously possess the characteristics of homeostasis, heredity, cells, reproduction, and