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o

Across
difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences
The adjustment or changes in behavior, physiology, and structure of an organism to become more suited to an environment
Natural selection in which individuals at one end of the phenotypic range survive or-reproduc more successfully than do other
an individual's collection of genes. The term also can refer to the two alleles inherited for a particular gene.
the end of an organism or of a group of organisms (taxon), normally a species.
any trace of past life. The most obvious fossils are body parts, such as shells, bones, and teeth.
similarity in sequence of a protein or nucleic acid between organisms of the same or different species.
a scientist who studies fossils
the study of the distribution of species and ecosystems in geographic space and through geological time.
the change in allele frequencies that occurs over time within a population.
the ability to survive to reproductive age, find a mate, and produce offspring
the transfer of genetic variation
a process by which two species that could otherwise produce hybrid offspring are prevented from doing so
a feature of an organism
belief in or the policy of advancing toward a goal by gradual, often slow stages
the tiny remains of bacteria, protists, fungi, animals, and plants
Natural selection in which individuals on both extremes of a phenotypic range-surviv or reproduce more successfully than do i
Down
the number of organisms of the same species that live in a particular geographic area at the same time, with the capability o
the change in the frequency of an existing gene variant (allele) in a population due to random sampling of organisms.
the evolution in two or more species in which the evolutionary changes of each species influence the evolution of the other s
an earth science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which they chan
study of the interactions of the Earth and its hydrosphere and atmosphere with the great diversity of life forms
occurs when a new species evolves in geographic isolation from its ancestor.
the genetic constitution of an organism
The evolution of different forms or structures in related species as they adapt to different environments
the process whereby organisms not closely related (not monophyletic), independently evolve similar traits as a result of havi
the science that seeks to explain the distribution of species, and higher taxa (the rank above species) , on the surface of t
evolution on a scale at or above the level of species, in contrast with microevolution, which refers to smaller evolutionary
he actual or hypothetical organism or stock from which later kinds evolved.
structures of different species having similar or corresponding function but not from the same evolutionary origin.