Filter the results Item type Select All/None Service Subscription Collection Movie File Question Page Image Stats Folder Quiz New items since Yesterday Last week Last month Ever Search results Subscribe to an always-updated RSS feed. 2254 items matching your search terms. Sort by relevance date (newest first) alphabetically a collection of all ecosystems on Earth Located in Biology / Basics / Introductory concepts in Biology - 2 A set of populations inhabiting a particular area Located in Biology / Basics / Introductory concepts in Biology - 2 All living things in a particular area together with the abiotic, nonliving parts of that environment Located in Biology / Basics / Introductory concepts in Biology - 2 An organism that cannot make its own food and must consume other organisms to obtain its energy Located in Biology / Basics / Introductory concepts in Biology - 2 An organism with cells that have nuclei and membrane-bound organelles Located in Biology / Basics / Introductory concepts in Biology - 2 The ability of an organism to maintain constant internal conditions Located in Biology / Basics / Introductory concepts in Biology - 2 The highest level of the taxonomic hierarchy; includes the Eukarya, Archaea, and Bacteria Located in Biology / Basics / Introductory concepts in Biology - 2 ِِِِِAn individual living entity Located in Biology / Basics / Introductory concepts in Biology - 3 A chemical structure consisting of at least two atoms held together by a chemical bond Located in Biology / Basics / Introductory concepts in Biology - 3 A diagram showing the evolutionary relationships among biological species based on similarities and differences in genetic or physical traits or both Located in Biology / Basics / Introductory concepts in Biology - 3 Previous 10 items 1 ... 4 5 6 7 8 9 10 ... 226 Next 10 items