Astudent had been studying mendel and his crosses using peas. the student wanted to test whether people preferred the flavor of green peas or yellow peas. she cooked peas of both colors and fed them to her classmates, then recorded whether each individual preferred the taste of the green peas or of the yellow peas. what would be an important variable for her to hold constant during this experiment?

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