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Ivan
3 years ago
10

How does the control of gene expression lead to differentiation of cell function in multicellular eukaryotes?

Biology
1 answer:
Sergeeva-Olga [200]3 years ago
6 0
Every cell of the organism has the same DNA sequence and same genes. However, not all genes are expressed in every single cell at the same time. Only those genes necessary for a specialised function of a specialised cell are expressed in the specialised cell. For example, skin cells have some different proteins than nerve cells. Genes responsible for those "skin proteins" are activated in skin cells and are turned off in nerve cells.
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Scientists are testing the effect of different scrubber technologies on the removal of pollutants from coal power plants. The sc
sladkih [1.3K]

Hello. This question is incomplete. The full question is:

"Scientists are testing the effect of different scrubber technologies on the removal of pollutants from coal power plants. The scrubbers use a slurry of limestone and water. Which of the following best describes the impact of modifying the slurry by increasing the amount of limestone? The amount of sulfur dioxide released will decrease. A The amount of ground-level ozone released will decrease. B The amount of water released will increase. C The amount of carbon monoxide released will increase. "

Answer:

The amount of sulfur dioxide released will decrease.

Explanation:

As you may already know, coal is a fossil fuel and burning it releases many toxic gases into the atmosphere, including sulfur dioxide.

A suspension of water and limestone, allows the calcium present in limestone to enter into reaction with sulfur dioxide, forming calcium sulfide and decreasing the emission of sulfur in the atmosphere.

The greater the amount of limestone in this suspension, the less sulfur dioxide will be released into the environment.

7 0
3 years ago
What is the advantage of using STR for the identification of bodies from a mass disaster, such as the World Trade Center?
never [62]
The correct answer is C. Short tandem repeats are mostly different in unrelated peoples' DNA. Therefore, it is used to match the DNA of the people of the related family for identification of bodies, during a mass disaster like World Trade Centre. DNA from the nucleus is extracted in the process, and the STR containing regions are amplified and studied and can be matched with that of the relatives.
5 0
3 years ago
An 80-year-old client with a history of coronary artery disease is admitted to the hospital for observation after a fall. during
lara31 [8.8K]
Orthopneic

The client's paroxysmal dyspnea was probably caused by sleeping in bed with the legs at the level of the heart; this position increases venous return from dependent body areas, increasing the intravascular volume. Sitting up and leaning forward while keeping the legs dependent slows venous return as well as increases thoracic capacity. Although the contour position elevates the client's head, it does not place the legs in a dependent enough position to substantially decrease venous return. The recumbent position is contraindicated. Venous return increases when the lower extremities are at the level of the heart. Also, the pressure of the abdominal organs against the diaphragm decreases thoracic capacity. The Trendelenburg position is contraindicated. Venous return increases when the lower extremities are higher than the level of the heart. Also, the pressure of the abdominal organs against the diaphragm decreases thoracic capacity.
3 0
3 years ago
Explain why the smell of a hospital or dentist's office can bring about negative emotions, and why the smell of baking cookies o
aalyn [17]

Answer:

Most humans would associate the smell of the doctor's or dentist's with something bad or painful, when on the other hand baking cookies or having a nice smell of Thanksgiving can remind us of tasty food and comfort with family or just comfort in general.

Explanation:

Above ^^

8 0
1 year ago
Help plz thoinksjgfydrtdxfgtu
ololo11 [35]

Answer:

Well, we actually evolved from a single cell organism. BUT, in this case it is

answer  B

Explanation:

5 0
3 years ago
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