List the fundamental forces of nature the are explained by the standard model

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b.passive c. facilitated d.active b.passive