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Shtirlitz [24]
3 years ago
8

Do all cells need ribosomes

Biology
1 answer:
sammy [17]3 years ago
6 0
Yes they do without it they could not produce protein.
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Virtually all cells in the human body have the same DNA. What’s make some undifferentiated cells differentiated into brain cells
mariarad [96]

Answer:

Changes in gene expression

Explanation:

This phenomenon is the result of changes in gene expression. That means, how the information in the DNA is used by the cell. The genes that are active in the cells of the brain will be very different from the genes that are active in the cells of the bone marrow.

These patterns of gene expression are different for each cell, and dictate the identity of that cell. Gene expression patterns are controlled by a variety of factors in the cell that allow tissue-specific expression, such a transcription factors.

This can also be facilitated by another layer of regulation called epigenetics, which literally means "on top of" genetics, and refers to modifications of DNA (and the proteins around it), that can reflect and influence the activity of the genes within.

8 0
3 years ago
What happens when a person who is allergic to ragweed encounters ragweed?
slava [35]
Ragweed antigens bind ragweed and then bind mast cells which release histamine 

<span>Allergies develop because of a Th2 response against the allergen. </span>

5 0
3 years ago
Which pair shares the same function?
kirza4 [7]

the answer is b

Explanation:

8 0
3 years ago
What rock layer is older then Loess.
laila [671]

Answer:

Loveland Loess

Explanation:

5 0
2 years ago
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Dean is a crime scene photographer. In which order should he photograph the crime scene?
Artemon [7]
There is no prescribed length of time it takes to photographically document a crime scene. The amount of time spent depends on the size and complication in the crime scene, how much there is to document and environmental factors like weather or danger to the investigative team. It can consist of thousands of photographs and hours of work.
Crime scene photography should not just focus on the obvious. The purpose of crime scene photography is to document what is there and where it is in relationship to the scene, whether it is obviously connected to the crime or not. For example, a photographer in Florida shot the inside of every cabinet and the refrigerator at a homicide scene in a home, just as a matter of procedure. It was later discovered that the victim had a receipt for a six-pack of beer, matching the beer shown in the photograph of the refrigerator. Relatives noted that the victim did not drink beer. Further investigation led the team to the convenience store where the beer was purchased and the surveillance tape showed the victim with an unknown person purchasing the beer. It turns out that the victim had picked up a hitchhiker, purchased beer for that person and come back to the house. The photograph of the refrigerator contents had created the link enabling the investigators to find the suspect.
3 0
2 years ago
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