Relies on observation to form an idea or hypothesis rather than trying to understand life from a nonphysical or spiritual point of view.
Whose idea influenced Darwin? He was an englich economist.
Whare are the two factors that could lead to evolution in generation to generation?
Genetic Variation and Natural selection
Who was the rival naturalist that was going to publish his work before Darwin?
A fossile that displays an intermediate state between an ancestral form and the form of its descendants.
This is the study of geographic distribution of extinct and living species.
THis means that a species is naturally found only in a particular location.
THis type of eveolution is when two different species from different lineages have independently evolved similar characteristics because they occupy similar environments.
The similar characteristics betweem two seperate species is called?
Analogous structures or convergent traits.
Refers to a program and procedure designed to modify traits in domestic species.
Selective breeding or artificial selection
Refers to a similarity taht occurs due to descent from a common ancestor.
structures that are similar to each other because they are derived from a common ancestor.
Anatomical Homologies or homologous structures.
are anatomical features that have no current function but resemble structures of their presumed ancestors
Another example of homology is the way that animals undergo embryonic development. Species that differ substantially at the adult stage often bear striking similarities during early stages of embryonic development
The most compelling observation at the molecular level indicating that modern life-forms are derived from a common ancestor is revealed by analyzing genetic sequences and finding genetic homologies
When two or more genes are derived from the same ancestral gene, they are called
They are called homologous genes
Homologous genes that are in different species are termed
two or more homologous genes found within a single species are termed?
consists of two or more copies of paralogous genes within the genome of a single species
New genes in eukaryotes have evolved from
During the evolution of eukaryotic species, many new genes have been produced by a type of mutation known as
new species arise from pre-existing species by the accumulation of genetic changes, such as gene mutations, gene duplications, and exon shuffling
process in which an organism incorporates genetic material from another organismwithout being the offspring of that organism
Horizontal gene transfer
Evolution at the genomic level involves changes in the chromosome