Answer:
A and C
Explanation:
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
The best answer is C.
Mercator projection is a type of map projection invented and introduced by Gerardus Mercator in the year 1569. The meridians are equally spaced, parallel vertical lines and the parallels of latitude are parallel horizontal lines spaced farther apart as their distance from the equator increases.
This projection is widely used for navigation charts because any straight line on a Mercator- projection map is a line of constant true bearing that enables a navigator to plot a straight-line course.
It is often described as a cylindrical projection but it must be derived mathematically.
Answer:
D. the elimination of the kraal system
Explanation:
The Maasai tribe of East Africa is an example of a traditional economy. The Maasai tribe typically found in Kenya and Tanzania use livestock such as goats, sheep and cattle as social utility, it serves as the primary source of income.
Some of the events that posed a challenge to the Maasai way of life includes the following;
I. A decline in the lion population because killing a lion symbolizes a rite of passage with respect to the bravery of a warrior.
II. Encroachment of their lands by farmers.
III. The loss of their lands to national parks for recreational purposes.
However, the elimination of the kraal system is not a challenge to the Maasai way of life.
A kraal system was peculiar to the Zulus and it's usually an enclosure that surrounds a livestock. They're typically used as a place for performing sacrifices, act as a homestead for livestock, used as a defense against attack.
Answer:
Is the production of crops and animals
Explanation:
This is often used as a chemical that fertilizes crops used on farms these harmful and dangerous antibiotics can also be used on animals.
Answer:
Lobster
Explanation:
Lobster was also known as the poor man's meal because the overabundance of these guys made it easy for people with no money to get their protein. In fact, these crustaceans were fed to prisoners, apprentices and slaves.
