You and your dog are walking along a pond. your dog looks into the still water and is startled to see its reflection. which phenomenon is responsible for the appearance of the dog’s reflection on the water's surface?

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

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

What do all of the above organisms have in common