- Life Sciences
a non-membrane bound structure made of proteins and nucleic acids that occurs within the nucleus of cells. Its function is to makes ribosomes within the nucleus.
a complex organic substance needed by the body in small amounts for normal growth and...
coiled nephron tubule that extends from the loop of Henlé to the collecting duct.
stage of photosynthesis that does not require light energy to occur.
(also called the carina) in birds is an extension of the sternum (breastbone) which runs along...