Multistep process by which the first cell of a new individual becomes a multi-celled adult.
A characteristic of a system that does not appear in any of a systems component parts.
Molecule or structure that responds to a specific form of stimulation.
Diverse group of simple eukaryotes.
A member of the prokaryotic domain Bacteria.
System similar to an object or event that cannot itself be tested directly.
Forms of an element that differ in the number of neutrons their atoms carry
Chemical bond in which two atoms share apair of electrons.
An attractive force that arises between two atoms when their electrons interact.
Atom that carries a charge because it has an unequal number of protons and electrons.
Type of chemical bond in which a strong mutual attraction forms between ions of opposite charge.
Attraction that forms between a covalently bonded hydrogen atom and another atom taking part in a separate covalent bond.
Tendency of molecules to stick together.
Nucleotide that consists of an adenine base, five carbon ribose sugar, and three phosphate groups. Also functions as an energy carrier.
Monomer of nucleic acids; has five-carbon sugar, nitrogen-containing base, and phosphate groups.
Small organic compound with a carboxyl group, an amine group, and a characteristic side group (R).
A bond between the amine group of one amino acid and the carboxyl group of another.
A lipid with a phosphate group in its hydrophilic head, and two nonpolar fatty acid tails.
Lipid with at least one double bond in a fatty acid tail.
Organic compound that consists of a long chain of carbon atoms with an acidic carboxyl group at one end.
Fatty acid with no double bonds in its carbon tail.
Semifluid substance enclosed by a cells plasma membrane.
Structural foundation of cell membranes; mainly phospholipids arranged tail-to-tail in two layers.
Region of cytoplasm where the DNA is concentrated inside a prokaryotic cell.
Organelle with two membranes that holds a eukaryotic cells DNA.
Structure that carries out a specialized metabolic function inside a cell.
A cells outermost membrane.
Fundamental theory of biology: All organisms consist of one or more cells; the cell is the smallest unit of life; each new cell arises from another cell; and a cell passes hereditary material to its offspring.