(genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity | an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system |
an abstract part of something | an abstract part of something |
an independent variable in statistics | the most favorable environment for a plant or animal |
anything that contributes causally to a result | a straight line that generates a cylinder or cone |
a businessman who buys or sells for another in exchange for a commission | the situation in which you are happiest and most effective |
one of two or more integers that can be exactly divided into another integer | any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
any of the numbers (or symbols) that form a product when multiplied together | one of four substances thought in ancient and medieval cosmology to constitute the physical universe |