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3 years ago

Which muscles arise from the skull and often attach to the skin?

Biology

2 answers:

sweet [91]3 years ago

6 0

Answer:

The correct answer is "Muscles of facial expression".

Explanation:

The muscles of facial expression belong to the skull and often are attached to the skin. This is particularly true for the muscles of the cheeks, allowing to open the oral cavity. The muscles of the cheeks are inserted into the skin and the mucous membranes of the lips, allowing for the changes of facial expressions that comes from emotions.

mash [69]3 years ago

3 0

Answer:

This question lacks options, the options are:

A. Extrinsic eye muscles

B. Muscles of mastication

C. Muscles that move the tongue

D. Muscles of facial expression

E. Muscles of the pharynx

The correct answer is D. Muscles of facial expression

Explanation:

The muscles responsible for facial expression develop from the second branchial or pharyngeal arch (called the hyoid arch), as part of the subcutaneous muscular lamina that forms the platysma and its facial extension. Muscles of facial expression have a mobile skin insertion, that means they are attached to the skin and are grouped around the holes in the face, orbit, nostrils, mouth, exerting a dilating or constricting action on them. These receive their motor innervation from the facial nerve (VII cranial nerve). In addition, the overlying skin receives its sensory innervation from the trigeminal nerve (V cranial nerve). It is important to note that the trigeminal nerve dependent muscles (chewing muscles) develop from the first branchial arch (or mandibular arch).

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Which conditions are common to all three of the following: genetic drift, the founder principle, and the bottleneck effect? a. i

Tcecarenko [31]

Explanation:

Common to genetic drift, the founder principle, and the bottleneck effect:

b. in small populations and result in a decrease in genetic diversity and/or an increase in the occurrence of specific genetic traits

c. when a small group of organisms only reproduce with each other to create a larger population of organisms

d. when the majority of a population is killed off and there are only a few remaining organisms left to rebuild the population

Further Explanation:

During the process of cell division, spontaneous changes within the genome can arise, called mutations. These are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes.

These mutations form variants which become stable within a population, leading to the formation of separate, genetically distinct populations called species.

mutations accumulate in a population over time, altering the frequency of alleles or different forms of a gene- this is called genetic drift.
In the founder effect, the separation of a group from a larger group can decrease genetic diversity, this can create a genetically distinct population
In the bottleneck effect, a population die off or barrier to reproduction increases the genetic drift in the population

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

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5 0

3 years ago

Read 2 more answers

The diagram shows two cells. Identify structures C, D, and E and explain how they work together to perform a specific process wi

soldi70 [24.7K]

Structure C, D, and E in the diagram represent the endoplasmic reticulum, the ribosome, and the Golgi apparatus respectively.

When the ribosomes are attached to the endoplasmic reticulum, they give it a rough appearance.

The ribosome, endoplasmic reticulum, and the Golgi apparatus work together in the synthesis and transport of protein within the cell. In other words, they are all involved in the secretory pathway of cells.

The ribosome represents the actual site of protein synthesis.
The endoplasmic reticulum gets involved by folding the synthesized proteins and packaging them into secretory vesicles. Thereafter, the vesicles are transported to the Golgi apparatus.
The packaged proteins undergo further processing within the Golgi apparatus before they are exported to the cell membrane via the cytosol.

In other words, the 3 organelles work together to form the secretory pathway of the cell. They are involved in the synthesis, packaging, processing, and eventual transport of proteins to their target sites.

More on the secretory pathway can be found here: brainly.com/question/4678228

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3 years ago

BRAINLIEST

Allushta [10]

Answer:

C) Mass

Explanation:

Mass is made up by the amount of protons, neutrons, and electrons in an object. Mass is essentially the capacity of an object, which many times is mistaken for weight.

Shape, color, and size are all common ways to determine the species of the bird, when only looking at the egg.

Hope this helps! :)

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3 years ago

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offsprin

Andrei [34K]

Answer:

The correct answer would be 2 in 4.

According to the question Xo and XO show codominance and express themselves completely when present in heterozygous condition. Cats bearing XoXO show patchwork of black and orange fur and are called tortoiseshell cats.

Xo codes for orange color fur and XO codes for black color fur. In addition, Y chromosome does not contain any gene associated with fur color.

Now, genotype of mother cat is XOXO (orange fur). So, the gametes formed would be XO only.

The genotype of father cat is XoY(black fur). So, the gametes would be Xo and Y.

The cross would lead to the formation of two male cats each having XOY as their genotype and two female cats each with XOXo as their genotype.

Hence, both the male cats would show orange fur and both the female cats would show patchwork of orange and black fur.

Therefore, we can conclude that 2 out of 4 would exhibit tortoiseshell coloring.

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3 years ago

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What is Nuc short for?

erma4kov [3.2K]

<span>Nuc is short for nucleus</span>

7 0

3 years ago