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the field of study that provides scientific names for organisms, describes them, preserves collections of them, provides classifications for them, keys for their identification, and data on their distributions, investigates their evolutionary histories, and considers their environmental adaptations.
found in the cell wall of xylem cells where the secondary cell wall is absent but the primary...
a complex chemical compound that fills the spaces in the cell wall between cellulose, ...
the U-shaped part of the nephron tubule situated between the proximal and distal convoluted...
a sac-like structure in plant cells that contains the cell sap. It supports the cell and helps...