Bruh me ok the question is how to make eggs

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong