Evolution & Natural Selection Crossword Puzzle

QUESTIONS LIST:

• natural selection : the process through which populations of living organisms adapt and change
• alleles : one of two or more genes that may occur alternatively at a given site on a chromosome
• sexual: dominant form of reproduction in living beings
• asexual: occurs when an organism makes more of itself without exchanging genetic information with another organism through sex
• prokaryotic : a type of cell that does not have a true nucleus or membrane-bound organelles
• eukaryotic : organism with complex cells, or a single cell with complex structures
• adaptations : a modification of an organism or its parts that makes it more fit for existence
• genetic drift : the change in frequency of an existing gene variant in the population due to random chance
• gene flow : the transfer of genetic material from one population to another
• speciation : how a new kind of plant or animal species is created
• extinction : the dying out of a species
• bacteria : microscopic living organisms that have only one cell
• binary fission : a form of asexual reproduction in which an organism divides into two, each part carrying one copy of genetic material
• homologous structures : similar physical features in organisms that share a common ancestor, but the features serve completely different functions
• analogous structures : features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature
• coevolution : the process of reciprocal evolutionary change that occurs between pairs of species or among groups of species as they interact with one another
• sexual selection : the process by which individuals compete for access to mates and fertilization opportunities
• selective breeding : choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics
• embryology : the study of the embryo and its development from a single-celled zygote to the establishment of form and shape
• viruses : an infectious agent that can only replicate within a host organism