Which principle states that, in undisturbed rock layers, the oldest rocks are on the bottom and the youngest rocks are on top?

Biology

2 answers:

BaLLatris [955]3 years ago

8 0

Answer:

Principle of superimposition states that in undisturbed rock layers, the oldest rocks are on the bottom and the youngest rocks are on the top. Phenomena of withering is behind this process. The rocks are withered due to the effect of water and air. The sediments or soil particles gets accumulated at another location. The layers of sediments gets compact with time and leads to the formation of rocks. The rocks being older are covered by layers of sediments with course of time. These sediments gets compact again forms new rocks. By this way the new young rocks are formed over the older rocks.

irina1246 [14]3 years ago

4 0

That would be the law of superposition :)

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Which of the following is not a natural cause of extinction?

dedylja [7]

Answer:

Introduction of Non-native species would be the answer. ( B )

Explanation:

Now let's break it down.

A. Competition due to overpopulation

Competition due to overpopulation, as competition of resources rises, species will fight among each other, and slowly, population will go down. But I don't see the reason of why it would cause an extinction... perhaps a decrease of population. See, once populations starts decreasing, resources will increase. And ONCE resources increase, populations starts increasing, and there goes competition. Resources decreases, populations decreases, and the whole process repeats. So I'm not quite sure whether it will cause extinction of a species.

B. Introduction of Non- native species.

So what does it mean by Non-native species?

It means that species that have no effect and doesn't exist in the ecosystem. So that will definitely not affect the population whatsoever.

C. Catastrophic Events

Well, common sense. Many people died of tsunamis, tornado and other natural disasters every year. Too many disasters can cause the population to cease.

D. Disease

This we can relate, especially the Coronavirus. Many humans died of the deadly virus. Same goes to animals. If a disease gets too deadly, population will decrease and drive the species to extinction.

So, the Answer would be B.

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