Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Evolution P2
quiz 2 study
| Question | Answer |
|---|---|
| Q: What is a selection pressure? | A: An environmental factor that affects which traits are favorable for survival and reproduction. |
| Q: What type of selection occurs when one extreme phenotype is favored? | A: Directional selection. |
| Q: What type of selection favors both extremes and selects against the average? | A: Disruptive (diversifying) selection. |
| Q: What type of selection favors the average phenotype? | A: Stabilizing selection. |
| Q: What is the main cause of allopatric speciation? | A: Geographic isolation (populations separated by barriers like rivers or mountains). |
| Q: What causes sympatric speciation? | A: Reproductive isolation within the same area (different mating times, food sources, or behaviors). |
| Q: What kind of evidence supports Darwin’s theory of common ancestry using similar bone structures? | A: Homologous structures. |
| Q: What is an example of an adaptation to desert environments? | A: Thick waxy leaves or water storage tissues to reduce water loss. |
| Q: What kind of selection results when female peacocks prefer males with bright feathers? | A: Sexual selection. |
| Q: How does migration (gene flow) affect the gene pool of a population? | A: It adds or removes alleles, changing allele frequencies. |
| Q: What is the effect of a mutation on a gene pool? | A: It introduces new alleles that may be beneficial, neutral, or harmful. |
| Q: What evolutionary pattern occurs when unrelated species develop similar traits due to similar environments? | A: Convergent evolution. |
| Q: What evolutionary pattern occurs when two species influence each other’s evolution? | Coevolution |
| Q: What is the difference between adaptation and evolution? | A: Adaptation is a trait that helps survival; evolution is the change in populations over generations. |
| Q: What is genetic drift and when does it have the greatest effect? | A: Random change in allele frequencies; it has the greatest effect in small populations. |
| Q: What is the difference between natural selection and sexual selection? | A: Natural selection favors survival traits; sexual selection favors traits that increase mating success. |
| Q: How can changes in selection pressure affect phenotype frequencies? | A: Different traits become more or less advantageous, changing which phenotypes are common. |
| Q: What is one example of coevolution in nature? | A: Bees and flowers evolving together — bees adapt to collect nectar, flowers adapt to attract bees. |
| Q: What is one piece of modern evidence that supports Darwin’s theory? | A: DNA and genetic similarities among different species. |
| Q: How does lateral gene transfer differ from traditional inheritance? | A: It’s the transfer of genes between organisms (not parent to offspring), often seen in bacteria. |
| Allopatric Speciation | New species form after geographic separation. |
| Sympatric Speciation | New species form without geographic isolation. |
| Convergent Evolution | Unrelated species evolve similar traits due to similar environments. |
| Homologous Structures | Similar structures in different species that show common ancestry. |
| Analogous Structures | Structures with similar function but different origin (e.g. wings of birds and insects). |
| Vestigial Structures | Reduced or unused features inherited from ancestors. |
| Lateral Gene Transfer | The transfer of genes between organisms other than by traditional reproduction. |
Created by:
sssb