This characteristic of hydrogen and oxygen make the water molecule polar

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

The pacific plate is an oceanic tectonic plate. how did a hot and the pacific plate interact to form the hawaiian islands?