Which of the following characteristics is associated only with an endoskeleton? a. it allows an animal to walk. b. it consists of fluids held in a cavity. c. it grows with the animal. d. it offers protection from predators.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate