Scientists find trilobites during a routine dig. Trilobites were common in the Paleozoic Era (540 to 245 million years ago) and went extinct during the late Permian period (248 million years ago). On another site, the scientists find ammonites. Ammonites lived during the Mesozoic Era (245 to 65 million years ago) and are not found after that period. What can be concluded about the rock layers? Choose all that apply.


A The rock layers must have formed at the same time because they both contain biozones.


B The rock layer containing the trilobites must have formed before the one containing the ammonites.


C The rock layer containing the trilobites must have formed after the one containing the ammonites.


D The rock layers must have formed at different times because they contain two different biozones.

Answers

Answer 1

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


Related Questions

Which of these statements best describes Kenya's economy?
totally market-based
socialist
market-based with some state-owned infrastructure enterprises
traditional

Answers

Answer:

Market bases with some state owned infrastructure enterprises

Explanation:

Major state enterprises include forestry, mining, fishing and tourism

How many branches of government did the Roman Republic have?
one
two
three
four
Tweaks

Answers

they had three branches

Answer:

3

Explanation:

Where is 90 percent of Earth's ice found?
O A. North Pole
O B. Arctic Circle
O C. Antarctica
D. Siberia

Answers

The answer would be C because 90% of the earths ice is found in Antarctica

Answer:

It is Antarctica

Explanation:

Because Antartica is the coldest reigon

How many divions in punjab pakistan and their districs?
give full answer plz....​

Answers

Answer:

Currently Punjab has ten divisions (and a total of 36 districts) with Sahiwal Division and Sheikhupura Division being the newest.

Bahawalpur Division:

Bahawalnagar District

Bahawalpur District

Rahimyar Khan District

Dera Ghazi Khan Division:

Dera Ghazi Khan District

Layyah District

Muzaffargarh District

Rajanpur District

Faisalabad Division:

Chiniot District

Faisalabad District

Jhang District

Toba Tek Singh District

Gujranwala Division:

Gujranwala District

Gujrat District

Hafizabad District

Mandi Bahauddin District

Narowal District

Sialkot District

Lahore Division:

Ferozepur District, Occupied by India

Kasur District

Lahore District (Lollywood)

Nankana Sahib District

Sheikhupura District

Multan Division:

Khanewal District

Lodhran District

Multan District

Vehari District

Rawalpindi Division:

Attock District

Chakwal District

Jhelum District

Rawalpindi District

Sahiwal Division:

Okara District

Pakpattan District

Sahiwal District

Sargodha Division:

Bhakkar District

Khushab District

Mianwali District

Sargodha District

Sheikhupura Division:

Nankana Sahib District

Sheikhupura District

Explanation:

Where does the process of eolian (wind transported) take place?

Answers

Answer:

Eolian occurs on beaches but can also occur in hot/cold deserts, agricultural fields and sometimes on planets (such as Mars/Venus)

Explanation:

The primary purpose of this map is to show
Africa
Uranium is a primary resource for countries.
Most of the diamonds found in Africa are mined in the
Coal is a primary resource for

Answers

Answer:

a

Explanation:

An example of both assimilation and desegregation is

Answers

Is there answers or...!

How are primary consumers different from secondary
consumers?
А
Primary consumers eat only plants; secondary consumers
eat other consumers.
В
Primary consumers eat other consumers; secondary
consumers eat only plants.
С
Primary consumers eat plants and other consumers;
secondary consumers eat plants and decompose matter.
D
Primary consumers eat plants and decompose matter;
secondary consumers eat plants and other consumers.

Answers

Answer:

yikess ion know i jus wanna comment on someone shii

Explanation:

Answer:

Correct answer is c       PLEASE MARK BRAINLIEST!!!!!!!!!!!!!!!

Explanation:

The approximate astronomical distance between Earth (in the Milky Way Galaxy) and the Andromeda Galaxy is 2.5 million _____.
A. AUs
B. parsecs
C. kilometers
D. light-years

Answers

Answer:

D. Light years

Explanation:

Help! Please answer correctly.

Answers

Explanation:

Climate - Varoesnfrom season to season

Terrian and major land formation - Landforms

The region that Alaska is located in is said to be one of the most geologically active areas in all of North America. This factor can be attributed to building a lot of the landforms that are located in Denali National Park.

Not sure of the rest sorry

In circle C shown below, a tangent has been drawn at point A. If m CBA   28 then explain why the measure of DAB must equal 62.

Answers

Answer:

The solution is shown below

Explanation:

From the image attached:

Line BC and line AC are the radii of the circle, therefore BC = AC.

Since BC = AC, the triangle ABC is an isosceles triangle with m∠CBA = m∠CAB = 28°

Also line ED is a tangent to circle C. From the circle theorems, a tangent to a circle is at right angle to the circle radius at point of contact. Since AC is a radii, ∠EAC = 90°

Therefore:

∠DAB + ∠EAC + m∠CAB = 180° (sum of angles on a straight line)

∠DAB = 180° - ∠EAC - m∠CAB

∠DAB = 180 - 90 - 28 = 62

∠DAB = 62°

Which processes produced heat that contributed to the formation of Earth's different layers? Check all that apply.
collision of materials
compaction of materials
cooling of low-density metals
radioactive decay
sinking of high-density metals

Answers

Answer:

a, b and d

Explanation:

it was correct on edge

The processes which produce heat that contributed to the formation of Earth's different layers include the collision of materials, compaction of materials, and radioactive activity.

There are three different layers that make up the Earth which are the mantle, the crust and the core. They are made of solid rock which is usually granite and basalt.

The radioactive decay of the elements that are in the Earth's crust releases heat energy. It should be noted that about fifty percent of the internal heat that comes from the Earth is through radioactive decay.

In conclusion, the correct options are A, B and D.

Read related link on:

https://brainly.com/question/9932896

Who developed a heliocentric model with elliptical orbits?

Answers

Johannesburg Kepler
Johannesburg Kelper

Our Winter Solstice occurs when the sun's rays directly hit the

Answers

Answer:

I believe it's the Tropic of Capricorn

Answer:

The winter solstice denotes the most limited day and longest night of the year. In the Northern Hemisphere, it happens when the sun is legitimately over the Tropic of Capricorn, south of the equator and goes through Australia, Chile, southern Brazil, and northern South Africa.

Throughout the winter solstice, the Sun sparkles most straightforwardly on the Tropic of Capricorn, 23.5 degrees south of the equator, giving its most immediate on vitality Earth toward the Southern Hemisphere.

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Help on this and write the 3 of the types of subsistence agriculture

Answers

Answer:

1.

2.

hope this helped you

The continental crust is?

Answers

DescriptionContinental crust is the layer of igneous, sedimentary, and metamorphic rocks that forms the continents and the areas of shallow seabed close to their shores, known as continental shelves.
The continental crust is the layer of granitic, sedimentary, and metamorphic rocks, which form the continents and the areas of shallow seabed close to their shores (continental shelves).

Which of Earth's layers is just below the crust?
lower or upper ?

Answers

Answer:

Explanation:

Lower

Lower layer which is called mantle and it consists of rocks and heat

Explain one reason why informal employment has grown rapidly in some cities.

(2 Points)

FASTEST ANSWER = BRAINLIEST AND 5 STAR

Answers

Answer:

Informal employment has grown rapidly in some cities due to the point that the population of some cities are rrapidly increasing in population, therefore there are not enough proper jobs for the population so some have to resort to informal employment.

Explanation:

Answer:

Answer: taxation and regulation

when taxation and regulation make legal production and trading very expensive people turn more and more illegal production

DEAR STUDENT

I HAVE ANSWERED YOUR QUESTION SO NOW AS U SAID IF SOMEONE ANSWERS YOU MARK HIM/HER AS BRAINLIEST SO PLEASE MARK ME AS THE BRAINLIEST

What is the average of all data points in a data set? the mean the median the mode the range

Answers

Answer:

Mean

Explanation:

The arithmetic mean, also called the expected value or "average", as in your case is what the answer to your question should be.

The mean is the average of all data points in a data set. Hence, option A is correct.

What is meant by data points?

The phrase “data point” generally corresponds to the singular form of data, or datum. It is the actual data obtained from a measurement or research, and in a statistical or analytical setting, it might be shown as a numerical data point, a statistical presentation, or a graph.

A collection of one or more measurements taken on a single member of the observational unit is referred to as an observation or data point.

In a study of the variables that influence the need for money using the individual as the unit of observation, the values of income, wealth, age of the individual, and the number of dependent would be examples of data points.

Thus, option A is correct.

For more details about  data points, click here:

https://brainly.com/question/17148634

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in this fictional map which elements suggest absolute location

Answers

Answer:

Wheres the map?

Explanation:

What percentage of garbage can be burned as fuel?
66 percent
50 percent
10 percent
100 percent

Answers

Answer:

66 percent

Explanation:

The percentage of garbage that can be burned as fuel would be 66%. Not all garbage in the world can be combusted in order to be used as fuel. A small percentage of it is not favorable to be used as fuel.

Hope this answers the question

Have a nice day

The answer is 66 percent

URGENT!!, WILL GIVE BRAINLIEST, PLEASE TRY AND SHOW YOUR WORKINGS.
Convert the following scales:
1. 1: 200,000 to scale as a statement.
2 1: 100,000 to linear scale.
3. 1: 150,000 to linear scale.
4. 1: 400,000 to scale as a representative fraction.

Answers

Answer:

1:20, 1:4,000, 1:50,000, 1:200,000, 1:500,000, 1:20,000,000, 1:35,000,000, 1:37,000,000 and 1:100,000,000

I hope it'll help you much

The invention of the printing press facilitated which three events? a decrease in the cost of books the spread of information to many people a sharp increase in the price of books the sharing of scientific knowledge and discoveries a decrease in literacy among the elite class

Answers

Answer:

The spread of information to many people

The sharing of scientific knowledge and discoveries

A decrease in cost of all books

Explanation:

Took the test

Answer: Below

Explanation: Verified on Edmentum

Overall mineral crystal size depends on how fast a solution
O A. warms
O B. sinks
O C. cools
O D. rises

Answers

Answer:

C. cools

Explanation:

C. I hoped this helped

What effect do forest fires have on the biodiversity of an ecosystem

Answers

Explanation:

Forest fires make it harder for plants and animals in an ecosystem to grow, this causes a variety of plants in an ecosystem to become extinct in that area, animals have a hard time living in an ecosystem like this and that is why it is harder for biodiversity in an ecosystem happens.

               -Hope my answer is helpful!

The sudden simultaneous loss of large numbers of plants, animals and other organisms would inevitably impact the way species interact with each other. This, in turn, will affect the ability of ecosystems to bounce back after a high-severity wildfire

The local time in London is known as
A. London Time
B. Corrected Time
C. English Time
D. Greenwich Mean Time

Answers

D. Greenwich Mean Time
d) greenwich mean time

Which best describes the physical features of the Ridge and Valley region?
O It has scenic canyons and caves.
O It has the state's most important waterways.
O It includes the state's highest peaks.
O It includes a series of elevations and depressions.
mark this and ratum​

Answers

Answer:

It includes a series of elevations and depressions.

Explanation:

Ridges are basically small elevations and if you look at them from a flat surface, they might even look like small mountains. In reality they are only 700ft tall.

Valleys on the other hand are plains with not ridges or small mountains.

Therefore a ridge and valley region would consist of a series of elevations due to ridges and depressions due to the plain valleys.  

Answer:

D

Explanation:

The Ridge and Valley region is full of elevations and depressions. I also just had this on a quiz!

another one that needs helping with

Answers

1: phone

2: social media

3: digital gov

4: streaming video

1. smart phone
2. social media
3. digital governance
4. streaming video

what does alternative livelihoods mean

Answers

Answer:

here

Explanation:

Alternative livelihood project is a widely used term for interventions that aim to reduce the prevalence of activities deemed to be environmentally damaging by substituting them with lower impact livelihood activities that provide at least equivalent benefits.

BRAINLIEST!! ANSWER PLZ



7. Why have the gas giants failed to collapse into stars?



A. They spin very quickly on their axes.



B. They orbit the sun with retrograde motion.



C. They orbit the sun with prograde motion.



D. They spin very slowly on their axes.

Answers

Answer:

A. They spin very quickly on their axes

Explanation:

Penn Foster

Answer:

A. They spin very quickly on their axes.

Explanation:

The gas giants spin very quickly, creating a strong centrifugal force. This strong centrifugal force prevents them from collapsing under gravity.

#pennfoster

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