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xxTIMURxx [149]
3 years ago
13

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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1. Igloos are buildings that are made of packed
Margaret [11]

The particles of the snow have kinetic energy, but being a solid, it has less kinetic energy than that of liquid water. So they move around in a place about its mean position.

Option C

<h3><u>Explanation:</u><u> </u></h3>

Igloos are the small homes made up of snow. It used to be homes for the people living in Arctic regions in past. Now some tribes still live in these igloos, or they are made by tourists for amusements.

Snow is basically precipitation of ice from clouds. Being the solid form of water, ice has molecules more compactly arranged in its crystal structure. Thus, the molecules cannot move here and there like in fluid. But having some kinetic energy, they have certain movements i.e vibrations around its mean position.

7 0
3 years ago
A prospective groom, who is healthy, has a sister with cystic fibrosis (CF), an autosomal recessive disease. Their parents are n
son4ous [18]

Answer:

Explanation:

From the given information:

Since the parent are normal; Let assume that their trait is Pp

The affected sister  will be recessive in nature, so the trait will be pp

Now, the husband who is the groom will be a carrier with a probability of 2/3 since her sister is affected.

Also, the wife will be carrying a heterozygous trait since she is normal as well.

However, using Hardy-Weinberg assumption:

q^2 = \dfrac{1}{2500}= 0.0004

q = \sqrt{0.0004}

q = 0.02

Recall that:

p+q =1 \\ p = 1 - q \\p = 1 - 0.02 \\p = 0.98\\

Thus, p^2 = (0.98)^2

p^2 = 0.9604

2pq = 2 \times 0.98 \times 0.022

2pq = 0.0392

Finally, the required probability that there will be an affected offspring amongst the family is:

= \dfrac{1}{4} \times \dfrac{2}{3} \times 0.0392

= \dfrac{1}{153}

3 0
3 years ago
The movement of bone away from the midline of the body is called ________.
mixer [17]

The correct answer is D. Abduction

Explanation:

In medicine, the movement of limbs or bones is classified into different types including abduction, adduction, extension, and circumduction. In this way, adduction occurs when the bone or limb moves towards the middle line of the body or center of it while abduction occurs if the movement makes the bone or limb be away from the center of the body. On the other hand, extension occurs when a movement makes the angle of body parts wider and circumduction occurs when the movement is circular. Considering this, the type of movement in which a bone moves away from the midline of the body is the abduction.

6 0
4 years ago
What is most helpful in increasing the rate of plastics recycling
sleet_krkn [62]
It makes sense that increasing the rate of plastics recycling is helpful for eliminating waste. Think about it, when something can be reused, then it should be. Recycling allows this to happen and prevents landfills from being filled too quickly.
8 0
3 years ago
The photograph shows wild salmon. What makes wild salmon a renewable<br> resource?
AleksandrR [38]

The wild salmon has the capability of reproducing quickly, which makes wild salmon a renewable resource.

<h3>What do you mean by Renewable resources?</h3>

Renewable resources may be defined as those resources that are not exhausted and deliver endless energy.

Wild salmon can be taken as one of the chief sources of food that provides energy. This form of energy may lead to renewable energy because it is endless, as the reproduction rate of wild salmon is fast with  large clutch size.  

Therefore, the wild salmon has the capability of reproducing quickly, which makes wild salmon a renewable resource.

To learn more about Renewable resources, refer to the link:

brainly.com/question/79953

#SPJ1

5 0
2 years ago
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