1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zlopas [31]
3 years ago
12

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.
Geography
1 answer:
kifflom [539]3 years ago
8 0

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

You might be interested in
The closest known star to our solar system is Alpha Centauri, which is approximately 4.30 light-years away. A spaceship with a c
Nadusha1986 [10]

Answer:

2.58 years.

Explanation:

  • As the earth would be in 4.3 years approaching the space ship, thus to to find out the time the equation of

Δtr ⇒ Δto  √1-v2 / c2

  • i.e the relative time, observed tome and the velocity and light speed, will equal to time of 2.58 years as the velocity is 0.8 c.
5 0
3 years ago
Read 2 more answers
We can apply the Pythagorean theorem to ONLY right triangles <br> (True or false)
bixtya [17]

Answer: false

Explanation:

8 0
2 years ago
This region has an extended history, long winters, deciduous forests, rural farm communities, and a plethora of universities.
denis-greek [22]
<span>a. mountain west region </span>
5 0
2 years ago
Will give brainliest
Katen [24]
It's B. <span>to increase profits for oil-rich nations. Hope I helped!
</span>
5 0
3 years ago
What is [(u+1)/2] - 1 ?
lana [24]
It's u/2 - 1/2. Another way of writing it can be (u-1)/2. Hope it helps!!
5 0
3 years ago
Other questions:
  • Quais são os produtos típicos da Mata Atlântica?
    6·1 answer
  • Identify one example of how your beliefs, behaviors, or practices have changed as you have applied them to new situations. How d
    13·2 answers
  • A. An example of a sign of a pathogen on a diseased plant is a. soft rot b. a canker on a plant stem c. stunted growth d. myceli
    11·1 answer
  • How did most Basque settlers to the Intermontane West make a living?
    9·1 answer
  • A brand new filled can of chicken broth is 10 cm tall and has a radius of 10 cm. Mishka uses some of the broth to cook and now t
    13·1 answer
  • The South China Sea stretches from Singapore to __________
    15·2 answers
  • What can you conclude about the Persians?
    14·1 answer
  • What is the principal that states that younger rocks lie above other rocks?
    7·1 answer
  • The circumference of the target above is 6,901.72 mm.
    8·1 answer
  • Describe how heatwaves can bring both positive and negative consequences
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!