Ideas for question 6)? Thank you! This is regarding genes, DNA, stuff like that.

designer babies!

Explanation:

messing with genetics for preferred traits will inevitably be an expensive thing to do, so it could result in a generation of 'perfect' babies that we're genetically engineered, but that only the wealthy can afford to have. extremely unethical, even though it may start with good intentions (disease resistance, for example).

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.