The sustainability of our planet's resources ultimately depends upon our actions as citizens. what is something you can do as a student to reduce your ecological footprint?
a) carpool to school.
b) eat only 3 oz. of meat a day.
c) use pens instead of lead pencils.
d) wrap your sandwich in foil instead of using a plastic bag.

What best describes emerging scientific ideas

The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?

Transposon can cause mutations in genes at or near the site of transposon insertion. it is possible for these elements to transpose away from their original site, causing a reversion of the mutant phenotype. in some cases, however, even more severe phenotypes appear when these elements excise from this site, due to events at or near the mutant allele. what might be happening to the transposon or the nearby gene to create more severe mutations?