7.8 Continuing Evolution

Created by

Nana Hemans

Cards (20)

Mechanisms of genetic change
Changes in DNA
Gene mutations
Chromosomal mutations
Cell division
Crossing over
Environmental disruptions
Continuous change in the fossil record is evidence of the continued evolution
Fossils 
Observation or impression of an organism that lived in the past
Strata layers 
Arrange fossils in the order they were deposited
Indicate new fossils or changes in the environment
Transition fossils can show the evolutionary changes as one group evolves into another while offering an incomplete chronicle of evolutionary change
Gaps exist in the fossil record because the rocks got destroyed by erosion and human activity
Resistance to various chemicals contributes to species evolution
Evolution of resistance to chemicals can become evident through natural selection
Resistant organisms 
Could be selected for under conditions where the trait is advantageous
Pathogen 
Infectious agent that can produce a disease and cause diseases
Pathogens evolve and cause emergent diseases
2009 swine flu pandemic
New strain of H1N1 influenza subtype identified, caused by reassortment of genes originally found in human and swine flu
COVID-19 pandemic
Variation of the Coronavirus family of viruses first discovered in 2019, primarily causes respiratory illness
Proposing a new step researchers might take to increase the reliability of the experimental observations
Evidence of genomic changes within a population over time provides evidence that all life has evolved and continues to evolve
Evolution of resistance to antibiotics, pesticides, herbicides, and chemotherapy drugs contributes to species evolution
As pathogens evolve, the phenotypes selected for and against in host populations can change over time
Transduction - Bacteria gets infected by a virus (bacteriophage)
Conjugation - Bacteria communication through a protein channel
Translation - When Bacteria eats it's dead friends to get the DNA to evolve resistance to the antibiotic