You have taken E coli strain A which has its own plasmids and mixed it with E coli B strain without plasmids E coli B cells now have plasmids but in addition they also carry some genes from E coli A strain. What has happened is:.
A. The E coli B cells have become mutants of the original culture.
B. Vertical transmission of DNA has occurred.
C. An example of transformation.
D. The calls of E coli A were Hfr cells.

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

1. label high-pressure areas with the letter h. 2. label low-pressure areas with the letter l. 3. over which area(s) would you expect to see rain or snow? 4. over which area(s) would you expect to see clear skies? 5. draw arrows around the h on the map to show the wind direction. 6. draw arrows around the l on the map to show the wind direction. 7. imagine that you live in maine. currently there is a high-pressure area over maine. if a low-pressure area moves in, how will the direction of the wind change? 5. draw arrows around the h on the map to show the wind direction. 6. draw arrows around the l on the map to show the wind direction. 7. imagine that you live in maine. currently there is a high-pressure area over maine. if a low-pressure area moves in, how will the direction of the wind change? 8. imagine that you live in colorado. currently there is a low-pressure area over colorado. if a high-pressure area moves in, how will the direction of the wind change? 9. according to the map, where would the strongest winds be expected? (refer to the lesson if needed.)

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that