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gregori [183]
4 years ago
11

What can the scientist conclude from this finding ?

Biology
2 answers:
Studentka2010 [4]4 years ago
7 0

Answer:

Option D, Fossil in layer 6 are less than 540 million years old

Explanation:

In any fossil deposition, the youngest of fossils lies at the topmost layers while all other layers below it are much older than it.

Here, layer 1 lies at the bottom and layer 13 lies at the top. Thus, layer 1 is the oldest and layer 13 is the youngest fossil.

In the question , it is given that index fossil of age 540 million years old are found at the layer 5, therefore all layer lying above it will be less than 540 million years.

Therefore, option D is correct.

Gwar [14]4 years ago
3 0
D. Fossil in layer 6 are less than 540 million years old
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Answer:

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3 0
3 years ago
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How can reproductive barriers form sympatric populations while their members remain in the same geographic area?
grandymaker [24]

Answer: Polyploidy

Explanation:

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If the genomes of a polyploid species come from the same ancestral species, it is said to be autopolyploid or autoploid. And if they come from two different ancestral species, it is said to be allopolyploid or alloploid. <u>Depending on the number of complete chromosome sets that the species has it is called triploid (3X), tetraploid (4X), pentaploid (5X), hexaploid (6X) and so on, where X is the monoploid number, and not to be confused with the haploid number. </u>

Redundant genetic elements of polyploid organisms can be transformed into single copies by sub-functionalization, neofunctionalization mechanisms or by the appearance of certain mutations.

<u>Two populations are sympatric when they exist in the same area and thus frequently encounter one another. </u>In general, different species cannot interbreed and produce healthy and fertile offspring due to barriers known as reproductive isolation mechanisms.  Polyploidy speciation is common in plants but rare in animals. So, animal species are much less tolerant of changes in ploidy. For example, human embryos that are triploid or tetraploid are not viable, cannot survive.

4 0
3 years ago
The appearance of an organism, such as smooth or wrinkled seeds, is referred to as a:
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3 0
3 years ago
Deadline coming up!!!! Help me please!!!!!!!! Needed desperately!!
TiliK225 [7]
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2d. Ribosomes manufacture protein in cells


3a. The first diagram shows the process of mitosis. The second diagram shows the process of meiosis. Mitosis results in 2 daughter cells whereas meiosis results in 4 daughter cells (as you can see in the diagrams)

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I can't see the rest of the 5th question but I hope I've helped with the rest. I'm happy to answer any other questions you might have :)



7 0
4 years ago
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