Why would scientists want to look at and compare seeds in the soil vs. seeds found in the elephant poop?

your answer is "the 1950's"

the answer to you question is   jet streams

b - the respond is innate and varies over time.

good luck!

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.