- Life Sciences
the widespread and rapid extinction of species in the present age due to negative human impact on the environment.
(also called autotrophic organisms) organisms that produce their own organic food, mainly...
epithelial tissue consisting of a single layer of cells.
the tube that carries urine from the nephrons to the ureter via the renal pelvis.
elongated cells in the xylem of vascular plants that transport water and mineral salts.