Short-spined sea urchin fossils were found directly above long spined sea urchin fossils in a layer of rock. What do the differences between the two sets of sea urchin fossils suggest about them? a. The longer spines developed as the shorter-spined sea urchins grew older. b. The longer-spined sea urchins existed before the shorter-spined sea urchins. c. The shorter-spined sea urchins stretched their spines to ward off predators. d. The shorter spines did not protect the sea urchins well enough and they died off

The  pelagic  region is divided into three zones. the top zone is the euphotic or sunlit zone. this is the ocean zone that sunlight penetrates. because this zone gets sunlight, photosynthesis can occur and plants can grow here.sub  zones. the oceanic zone is subdivided into the epipelagic,  mesopelagic, and bathypelagic zones. the epipelagic (euphotic) zone, also called the sunlit zone, receives enough sunlight to support photosynthesis.your question does not include multiple choice,but i can give you some info on what the 3 zones hope this : -)

Stimulates weight gain, so you put on excess weight

In the correct the steps in washing hands,    when applying soap and scrubbing, you must lather your hands by rubbing them together with the soap. lather between your fingers, under your nails and the  backs of your hands, . and scrub your hands for at least 20 seconds. you may use “happy birthday” song from beginning to end twice for your timer.