The variable is the group that was given caffine, because thats what the doctors manipulated. They possibly altered the natural memory of the participants by giving them caffine. A more specific variable could be how much caffine each participant is given and what time are they given it.
Answer:
D)
Explanation:
I honestly don't like this question. It's a really poor question. But anyway, here's the explanation:
1) All search results are <em>somewhat </em>relevant. They have the keyword "cell phone" in every result. So none should be considered off-topic.
2) Matching personal opinion with given answer choices.
My personal list if any, would have been 3, 1, 2, 4.
But since the author has helped as out, 3 and 2 are guaranteed to be the top choices, the last part is determining whether search result 4 is more relevant compared to 2.
Since I believe 1 is somewhat relevant, A and C are negated. Leaving, B and D. In this situation, I would prefer 1 than 4 since search result 4 doesn't exactly help your research paper compared to search result 1. Therefore, the only choice is D.
Answer:
Genetics.
Explanation:
Over time animals and plants of all sorts have evolved into several different things. there is no limit to the differences that can exist, as life is ever changing.
Answer:
Hey mate.....badge photo is not clear
Answer:
"Why we grow so much corn (about 87 million acres each year) is because we can. ... Anti-ethanol advocates also like to pick on corn. They thrust with a two pronged argument: that too much good food producing corn is being used for fuel, and that ethanol is driving up the cost of corn and, thus, food."
Explanation:
