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
Biology PP30
Natural Selection
| Question | Answer |
|---|---|
| Lamarck | suggested that organisms evolved by the process of adaption |
| What did Darwin observed in the finch species? | they differed in beaks and feeding habitats. He believed it was evolution |
| What did Darwin observed? | organism produce more offspring than the environment can support; they vary in many characteristics; these variations can be inherited |
| What did Darwin concluded? | individual best suited for an environment are more likely to survive and reproduce than those less adapted; indiv. w/favorable characteristics increases; pop. gradually change to environment |
| What year did Darwin publish Origin of Species | 1859 |
| Natural Selection - define it | the differential reproduction of genotypes caused by factors in the environ. leads to change through time = evolution |
| Step 1 in natural selection | individual produce more offspring than can survive, resources are limited |
| Step 2 in natural selection | individual vary in many traits (random mutation leads to genetic variability) |
| Step 3 in natural selection | variation is often passed to offspring |
| Step 4 in natural selection | individ. w/traits that are more suited (adpated) to their environ. are more successful at passing their traits on to next generation |
| Step 5 in natural selection | over time, favorable alleles become more frequent & disadvantage alleles become less frequent |
| What is artificial selection | when human chose organisms with specific characteristics as breeding stock, they are performing the role of the environ. |
| Example of artificial selection | five veggies derived from wild mustard |
| Two main reason why evoltuion is important | 1) evolution of insecticide resistance 2) pesticide resistance |
| How do insects become more resistant to pesticides? | Pop. have genetic variation 2) environ. change and kill the ones not having that mutation 3) insects become more resistant |
| Which evolve quicker, bacteria or eukaryotes? | bacteria (20 min. generation time) |
| Why can bacteria evolve so fast? | huge pop. w/lots of genetic diversity, get genes via horizontal transfer (plasmids w/ Multiple Drug Resistance) |
| How do we get antibiotic resistance in bacteria? | by using more antibiotic (we wipe out the bacteria w/out plasmid and the plasmid one is left and that divides) |
| What can we do to decrease bacteria | wash hands, stay home when we're stick; take full course of antibiotic; antiobiotic do not cure viral infection |
Created by:
Tiffastic
Popular Biology sets