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AleksandrR [38]
3 years ago
5

In an effort to deal with an increasing number of immigrants

Biology
1 answer:
LekaFEV [45]3 years ago
8 0

Answer:

Assuming that question asking the measures taken by the U. S. government in past the correct answer would be - opened a station for immigrants on Ellis Island in New York.

Explanation:

To deal with the elevation of the numbers of immigrants the U. S. government established an immigration station or point on Ellis Island located in New York City.

This station was opened in the year 1892. It was an entrance door for immigrants that come into the United States. South and Eastern Europe people were the majority of the immigrants that come these 60 years.

Thus, the correct answer is - opened a station for immigrants on Ellis Island in New York.

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Is blood clotting an example of a positive or negative feedback mechanism? Explain your answer based on the description of the m
serg [7]

Answer:

Blood clothing is an example of positive feedback.

This type of feedback mechanism is useful to the body because it multiplies the factor that intervenes in clotting accelerating the process.

If a toxin affects the molecules that signal for platelets the feedback will not be effective enough to produce clotting and the body will keep bleeding.

Explanation:

Blood clotting is an example of positive feedback due to the fact that when the vascular endothelium is damaged  platelets will go to this area and activate themselves once they are in contact with the collagen fibers of the damaged structure. When the platelets are activated they will release the contents that is stored in their granules. One of the contents is a Gq-linked protein receptor cascade,  that will increase the concentration of calcium in the platelets. Calcium activates protein kinase C, which, in turn, activates phospholipase A2 (PLA2). PLA2  will modifies  an  integrin membrane  increasing its affinity to bind fibrinogen. The activated platelets change their  shape , and the fibrinogen cross-links with the integrin membrane aiding  in  the aggregation of adjacent platelets. After this the coagulation cascade takes place. there are two pathways the extrinsic  and the extrinsic one.

The extrinsic pathway will be activated due to tissular factor released  by the platelets and the intrinsic pathway will be activated due to endothelial collagen. The final product of both pathways is factor x.

Factor x will transform prothrombin into thrombin will activate the conversion of fibrinogen into fibrin. Thrombin will form a net of fibrin that will the clot.

A cascade reaction is useful because every component of the cascade are related making a quick reaction once that one of then is activated and can activate other or more factors.

If a toxin affects the molecules that signals for platelets, platelets will not go to the damaged area and in consequence there will not be thrombin and fibrin to form the clot together with platelets.

7 0
3 years ago
HELLLLLLLLLLP MEEEEEEEE PLS
goldfiish [28.3K]

Answer:

3 and 4

Explanation:

Both appear to be up river which mean they're coming DOWN to contaminate the uptake. If they're ahead of the uptake facility they're not going to show up in the water. I only know this because of City Skylines :)

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3 years ago
Every time energy is transferred between organisms in a good web some of the energy is lost as heat true or false
Svet_ta [14]
The answer would be false
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11. Why<br> are<br> organisms with more similar amino acid sequences more closely related?
jok3333 [9.3K]

Answer and Explanation:

Because the DNA sequence determines a protein's amino acid sequence, a gene shared by two closely related organisms should have similar, or even identical, amino acid sequences. That's because closely related species most likely diverged from one another fairly recently in the evolutionary span. Thus, they haven't had as much time to accumulate random mutations in their genetic codes.

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3 years ago
EDGE AP BIOLOGY<br><br> Does anyone possess the Cell size lab report?
Svetradugi [14.3K]

Answer:

i do!

Explanation:

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