Listed in the Item Bank are individual steps that need to be ordered. To find out more information about steps, some have more details available when you click on them. Drag and drop the steps in the proper order by placing each in its corresponding open rectangle. Be sure that the earliest step is placed next to the number 1.

Place the organisms or events in order from when they first appeared on Earth to present (MA = millions of years ago and TA = thousands of years ago)
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eukaryoteFirst life beginsPhotosynthesis beginsReptiles
3800 MA
3000 MA
2000 MA
1000 MA
570 MA
500 MA
475 MA
400 MA
360 MA
300 MA
200 MA
150 MA
130 MA
200 TA

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

straight or amphibians are homeothermic to thermal