LIVING ENVIORMENT: Evolution Flashcards
Evolution
a process of change through time
Homologous structures
similar body parts in different organisms
Analogous structures
different structure, similar function
Fossils
the remains the traces of organisms that no longer exist
Common ancestor
organisms from which the other organisms evolved from
Embryology
Embryology is the branch of animal biology that studies the prenatal development of gametes, fertilization, and development of embryos and fetuses
Adaptation
features which makes a species better suited to live and reproduce in its environment
Variation
differences in genes that cause differences in traits
Overproduction
within a population there are more offspring produces in each generation they can possibly survive
Natural selection
traits which are beneficial to the survival of an organisms are retained and passed on and there for increase in frequency within a population
Survival of the fittest
organisms best adjusted to their environment are the most successful in surviving and reproducing
Speciation
the development of a new species occurs as variations or adaptions accumulate in a population of many generations
Competition
natural resources, food, water and space to a population is limited there must be competition between organisms
Resistance
insects or bacteria can become resistant to chemicals/medicine this is because of NATURAL SELECTION
Selecting agent
biological agents and toxins that have been determined to have the potential to pose a severe threat to public health and safety, to animal and plant health, or to animal or plant products.
Mutation
can cause organisms to have genetic variations
Phylogenetic tree
the study of evolutionary relationships among a group organisms
list 3 of the lines of evidence for evolution
fossil records
comparative anatomy
DNA comparisons
compararative anatomy
the study pf differences and similarities between living things
An anatomical feature that no longer seems to have a purpose in the current form of an organism
vestigial structure
Some organisms that share a common ancestor have features that have different functions, but similar structures. These are known as
homologus structures
A slight difference in an inherited trait between individual members of the same species.
variations
Structures or behaviors that help an
organism survive in its surroundings
Adaptations
What is natural selection?
organisms with traits well suited to their environment survive and reproduce at a greater rate
The process of choosing parent organisms for desired characteristics is called
Artificial selection
Evolved from different ancestors, but due to living in similar environments have a similar function.
Anolougus structures
How do you “win” at natural selection?
survive & reproduce
