<span>The rock layers must have formed at different times because they contain two different biozones.
The rock layer containing the trilobites must have formed before the one containing the ammonites.
The key thing to note here is that the Trilobites only lived from 540 to 248 million years ago. And that the Ammonites were from 245 to 65 million years ago. So there's a 3 million year gap between these 2 different creatures where neither of them existed. So the dig where the trilobites were found has to be at least 3 million years older than the dig where the Ammonites were found. So with that in mind, let's look at the options and see what makes sense.
The rock layers must have formed at the same time because they both contain biozones.
* This is nonsense no matter what dates you're speaking of. In effect it claims that all rocks that indicate life were created at the same time. So this is definitely a bad choice.
The rock layers must have formed at different times because they contain two different biozones.
* This is technically incorrect since it assumes that all biozones represent an unique period of time which is incorrect. However, since the biozones represented by the presence of Trilobites and Ammonites don't overlap, it is true that these these rock layers were formed at different times. I would have preferred if this option said "non overlapping biozones". But on the balance, I'd consider this option to be true, so it should be selected.
The rock layer containing the trilobites must have formed before the one containing the ammonites.
* This is definitely true since the last Trilobite died about 3 million years before the first Ammonite lived. So this is a correct choice.
The rock layer containing the trilobites must have formed after the one containing the ammonites.
* This is the opposite of the previous option. And since the previous option was true, this option must be false. So this is a bad choice.</span>
A
the built environment has an impact on the natural environment
Answer:
False
Explanation:
The farmers in Central America have been using pesticides extensively in the past several decades. While everyone would prefer that the bananas, as well as the other fruits, be all natural, organic, it is simply not practical and that type of production will result in deficit of the product on the market. The reason why the pesticides are used so much is so that the tree is not attacked by diseases and pests and the bananas to get destroyed.
The usage of pesticides actually contributes to the tree growing taller and being healthier, as the diseases and pests are mostly eliminated. The bananas themselves are too larger and in higher quantity, so the demand on the market is largely satisfied.
Answer:
Here to stay and will have lasting effects.
Explanation:
The professor says "whether we like it or not" which could mean there will be many effects of globalization, some could be positive or negative and there would be reason for certain people to not like it. Also, "here to stay" as in coming into our lives to remain forever.
