The collection of all the ecosystems in earth

The smallest fundamental unit of structure and function in living things

The set of populations inhabiting a particular area

All of the individuals of all species living within the specific area

All of the living things in a particular area together with the abiotic (no living) part of the environment

An organism with cells that have nuclei and membrane-bound organelles

The ability of an organism to maintain constant internal conditions

A large molecule, typically formed by the joining of smaller molecules

A chemical structure consisting of at least two atoms held together by one or more chemical bonds

A collection of related tissues grouped together performing a common function

A level of organization that consists of functionally related, interacting organs

A small structure that exists within cells and carries out cellular functions

An individual living entity

All of the individuals of a single species living within a specific area

A single-celled organism that lacks a nucleus and membrane-bound organelles

A group of similar cells carrying out related functions

A molecule that donates hydrogen ions and increases the concentration of hydrogen ions in a solution

A negative ion that is formed by an atom gaining one or more electrons

A molecule that donates hydroxide ions or otherwise binds excess hydrogen ions and decreases the concentration of hydrogen ions in a solution

A substance that prevents a change in pH by absorbing or releasing hydrogen or hydroxide ions

Occurs because water molecules are attracted to charges on the inner surfaces of a narrow tubular structure such as glass tubes, drawing the water molecules to the sides of the tubes

A positive ion that is formed by an atom losing one or more electrons

An interaction between two or more of the same or different atoms that results in the formation of molecules

A type of chemical bond that forms when electrons are shared between atoms

One of the 118 unique substances; each element has unique properties and a specified number of protons

Type of chemical bond between slightly positively charged hydrogen and slightly negatively charged atoms in other molecules

An atom or chemical group that does not contain equal number of protons and electrons

A type of chemical bond that forms between ions with opposite charges (cations and anions)

Anything that has mass and occupies space

Any molecule containing carbon (except carbon dioxide)

An organizational chart of elements indicating the atomic number and atomic mass of each element— provides key information about the properties of the elements

A substance capable of dissolving another substance

Tension at the surface of a body of liquid that prevents the molecules from separating

The loss of shape in a protein

Two linked sugar monomers

A chemical signaling molecule that acts to control or regulate specific physiological processes

A single unit or monomer of carbohydrates

A chain of monomer residues linked by covalent bonds

A long chain of monosaccharides

The linear sequence of amino acids in a protein

The association of multiple polypeptide subunits in a protein

A long-chain hydrocarbon with single covalent bonds in the carbon chain

Regular structures that proteins form by intramolecular hydrogen bonding

A proteins three-dimensional conformation, including interactions between secondary structural elements

A long-chain hydrocarbon that has one or more double bonds in the hydrocarbon chain

A protein- DNA complex that serves as the chromosomes’ building materials

Short, hair-like structures that extend from the plasma membrane in large numbers and functions to move an entire cell or move substances along the cells outer surface

The entire region between the plasma membrane and the nuclear envelope

Long, hair-like structures that extend from the plasma membrane and move the cell

A double-membrane structure that constitutes the nucleus’ outermost portion