Most colonies on streak plates grow from isolated colony-forming units. on rare occasions, however, a colony can be a mixture of two different organisms. if a culture is started from this colony (thinking it's pure), correct identification will be next to impossible because the extra organism could confound the identifying test results. how could you verify the purity of a colony? if you found the colony to be a mixture of organisms, what could you do to purify it?

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources