Week+3

1) **Abiotic** - A term that describes a nonliving factor in an ecosystem.

2) **Active Transport** - The movement of particles from an area of low concentration to an area of high concentration that uses energy provided by ATP or a difference in electrical charges across a cell membrane.

3) **Adenosine Triphosphate** **(ATP)** - A molecule that provides energy for cellular reactions and processes. ATP releases energy when one of its high‐energy bonds is broken to release a phosphate group.

4) **Adhesion** - The intermolecular attraction between unlike molecules.

5) **Capillary Action** - Results from the adhesive properties of water and the molecules that make up plant cells.

6) **Agriculture** - The artificial cultivation of food, fiber, and other goods by the systematic growing and harvesting of various organisms.

7) **Allele** - A variation of a gene’s nucleotide sequence (an alternative form of a gene).

8) **Allele Frequency** - The measure of the relative frequency of an allele at a genetic locus in a population; expressed as a proportion or percentage.

9) **Analogous Structure** - A physical structure, present in multiple species, that is similar in function but different in form and inheritance.

10) **Aquatic** - A term that describes an organism associated with a water environment.

11) **Atom** - The smallest unit of an element that retains the chemical and physical properties of that element.