Class Notes - Ms. Nevel's Biology Website
|Class Notes |Name: _______________________________________ |
|Evidence of Evolution |Period:_______________________________________ |
|Questions/Main Idea: |Date: _______________________________________ |
| |Notes: |
|What are the 4 main types of evidence to|Fossil Record |
|support evolution? |Anatomy |
| |Embryology |
| |Biochemistry |
|What are fossils? |Fossils → remains of ancient life |
|How are fossils used to show change over|Fossils arranged according to age show a progression of changes |
|time? |The Law of Superposition → a layer of rock is older than the layer above |
| |Fossils can be arranged by relative age |
| |Radioactive Dating → naturally occurring radioactive substances decay at a known rate |
| |Transitional forms of fossils are evidence for evolutionary change |
|What is a homologous structure? |Homologous structures: parts came from the same origins, but now may have different function |
| |e.g., forelimbs of all mammals contain the same pattern of bones, although the bones now carry out a variety of |
| |functions |
| |horse leg, bat wing, human arm, whale flipper |
| |[pic] |
|How do homologous structures support | Evolution works primarily by modifying pre-existing structures |
|evolution? |Similar structures show connections between organisms, and that they are related by an ancient common ancestor |
|What is an analogous structure? |Analogous structures: parts came from different origin, but now have same function |
|What is a vestigial structure? |Vestigial structures: parts have no current function (had a function in ancestors) |
| |Examples in humans: wisdom teeth, erector pili, coccyx, ear muscles, appendix |
| |[pic] |
|How do vestigial structures support |Show that our forms have changed over time. |
|evolution? | |
|How does embryology support evolution? |Closely related organisms develop similarly, especially in early fetal stages |
| |This suggests that these organisms are related to other forms. |
| |Mammal embryos (including humans) have fish-like gill slits, tails |
|Label the embryos with the correct |[pic] |
|organisms’ names. | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
|How does biochemistry support evolution?|All organisms share certain biochemistry |
| |Genetic code for building amino acids |
| |All organisms use ATP for energy |
| |Plasma membranes of all organisms consist of a phospholipid bi-layer |
|How is evolution observed today? |We can see microevolution in bacteria that become resistant to antibiotics; crop pests that become resistant to |
| |pesticides and herbicides |
|What is the difference between |Macroevolution = Large scale changes that take place incrementally over a long period of time. Result in new |
|macroevolution and microevolution? |species. Microevolution = Short time scale events (generation-to-generation) that change the genotypes and |
| |phenotypes of populations. |
| | |
|Summary: |
| |
| |
| |
| |
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- business studies notes class 12
- biology class 9 notes pdf
- science notes for class 10
- ms driver s permit practice test
- class 10 maths notes pdf
- class 12 chemistry notes pdf
- cbse notes for class 9
- taking class notes in college
- alzheimer s association website walk
- class reunion website template
- class 9 physics notes pdf
- ncert notes class 9