key terms

Cards (9)

active transport
the movement of substances from an area of low concentration to high concentration with the use of energy from respiration
adult stem cell
a type of stem cell that can form many types of cells
agar jelly
a substance placed in petri dish which is used to culture microorganisms
cell differentiation
the process where a cell becomes specialised to its function
cell membrane
a partially permeable barrier that surrounds the cell, controlling what goes in and out
cell wall
an outer layer that provides shape and structure for cells e.g. in plants, made from cellulose
chloroplasts
an organelle which is the site of photosynthesis
chromosomes
DNA structures that are found in the nucleus which are made up of genes
concentration gradient
the difference in concentration between 2 areas