- Life Sciences
group of similar organisms that can breed with each other to produce fertile offspring. It is the lowest level (taxon) in the classification system.
a structure that is used by molluscs for feeding. It is a minutely toothed, chitinous ribbon...
(also called polymers) large, more complex molecules formed when monomers join together.
processes used to create copies of DNA fragments (usually genes), cells or organisms to create...