7.8 Continuing Evolution
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
- FossilsObservation 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 organismsCould be selected for under conditions where the trait is advantageous
- PathogenInfectious 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