Across
- 2. non-random difference in reproductive output among replicating entities
- 5. an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaebacteria.
- 6. a new species evolve from a single ancestral species while inhabiting the same geographic region
- 8. an organism deriving its nutritional requirements from complex organic substances.
- 10. the action or process of classifying something according to shared qualities or characteristics.
- 14. various cells, tissues, and organs in a body which no longer serve a function. A vestigial structure can arise due to a mutation in the genome. This mutation will cause a change in the proteins that are required for the formation of the structure.
- 16. similar structures that evolved from a common ancestor.
- 18. A speciation in which biological populations are physically isolated by an extrinsic barrier and evolve intrinsic (genetic) reproductive isolation
Down
- 1. the system of nomenclature in which two terms are used to denote a species of living organism, the first one indicating the genus and the second the specific epithet.
- 3. selection applied by humans in order to produce genetic change.
- 4. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
- 6. the formation of new and distinct species in the course of evolution.
- 7. branch of biology that deals with phylogenesis.
- 9. a branching diagram showing the cladistic relationship between a number of species.
- 11. features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature (compare to homologous structures) and which evolved in response to a similar environmental challenge.
- 12. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
- 13. a principal taxonomic category that ranks above species and below family, and is denoted by a capitalized Latin name, e.g. Leo.
- 15. a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles. Prokaryotes include the bacteria and cyanobacteria.
- 17. the classification of something, especially organisms.