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RF2HYFM2J–Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida
RF2HW6TY4–Equisetum arvense, the field horsetail or common horsetail, is an herbaceous perennial plant
RF2HR26AT–Eutrophication sets off a chain reaction in the ecosystem, starting with an overabundance of algae and plants
RF2H3M9YG–Difference of mucosae of stomach, small and large intestines Difference of mucosae of stomach, small and large intestines
RF2H17XDG–Hepatitis B vaccine development and implementation Hepatitis B vaccine development and implementation
RF2GX5AXW–Earthworm septum is a membrane that is flexible enough to allow for contraction of the internal muscles
RF2GG9038–Photosystems are functional and structural units of protein complexes involved in photosynthesis
RF2GBT2BJ–Daphnia use a combined strategy of asexual and sexual reproduction during their life cycle
RF2G41DM6–Simple diagram of transcription elongation. Transcription is the first step of gene expression
RF2G9P55E–The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment
RF2G88BHA–Cross section of a vascular bundle in the stem showing food-conducting phloem and water-conducting xylem
RF2G5K0D8–The adrenal glands are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol
