Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the dependent variable for this experiment? a. the amount of water b. the height of the plant c. the amount of sunlight d. the amount of soil select the best answer from the choices provided

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas