Polystyrene is present in Styrofoam and other makes of foam. After 24 hrs, the team examined the zooplankton beneath a microscope. 13 in the fifteen zooplankton species experienced swallowed the beads. Articles of leather; saddlery and harness; journey products, handbags and equivalent containers; posts of animal gut (other than silkworm https://andrewz587lap7.wikiexpression.com/user