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Ilya [14]
1 year ago
7

A projection of bones in the back of the cranium where neck muscles attach is called a(n):__________a. nuchal torus. b. foramen

magnum. c. sagittal keel. d. sagittal crest.
Biology
1 answer:
Vikentia [17]1 year ago
7 0

A projection of bones in the back of the cranium where neck muscles attach is called a(n): nuchal torus.

<h3>what does cranium do?</h3>

One of the most important part of skull anatomy is the cranium.

The skull is made up of 22 bone where 8 bones are cranial bones which are attached to facial bone form a face and the complete structure of skull.

The major function of  cranium include to provide protection to the brain parts like cerebellum, cerebrum, and brain stem.

It also provide a surface for the facial muscles. The cranial nerve in cranium are essential for smelling, seeing, and chewing.

Learn more about cranium,  here:

brainly.com/question/14011479

#SPJ4

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Species a diverged from species b 60,000 years ago. On a particular gene, they have 15 nucleotide differences. How many nucleoti
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The given question says that b species diverged around 60,000 year ago from species a. Since the divergence, they have a nucleotide difference of 15 nucleotide.

We need to find out the nucleotide difference in another 240,000 year, which means a total of 300,000 year since divergence.

The nucleotide difference in 60,000 years = 15 nucleotide.

The nucleotide difference in 1 year =\frac{15}{60,000}  nucleotide.

The nucleotide difference in 300,000 years = \frac{15}{60,000}\times 300,000 nucleotide.

The nucleotide difference in 300,000 years = 75 nucleotide.

Hence, after another 240,000 years or 300,000 years since divergence, the species and species b would show a difference of 75 nucleotide.

In another 240,000 years, there would be 60 nucleotide difference, as 15 of the nucleotide are already different in initial 60,000 years from the total of 75 nucleotide difference in 300,000 years. So, 60 (75-15) nucleotide difference would be observed in next 240,000 years.


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