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Reptile [31]
3 years ago
5

What are three sources of signals related to the regulation of cell growth and division?

Biology
1 answer:
fgiga [73]3 years ago
4 0
<span>The three sources of signals related to the regulation of cell growth and division are  :
</span><span>a)  Other Cells
b)  Other Organs
c)  Environmental Conditions</span>
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1. Why is California at hingher for earthquakes than North Dakota
Pani-rosa [81]

Answer:

because California is located on the San Andreas Fault

Explanation:

California is one of the states that have higher seismic activity because it lies on an individual fault known as the San Andreas Fault. Faults are regions where two tectonic plates are moving with respect to one another, thereby they are prone to suffer earthquakes. The San Andreas Fault is a continental fault that extends approximately 800 miles (1,200 kilometers) through the US state. Conversely, earthquakes in North Dakota are uncommon because this state is located in the middle of a tectonic plate. The last earthquake in North Dakota had a magnitude of 3.3 (Richter Scale) and it happened almost 10 years ago (2012), in Williston.

4 0
3 years ago
When the body is invaded by antigens, the immune system forms substances called?
Fantom [35]
<span>Antibodies. A. k.a. immunoglobulins. They are produced by a group of white blood cells called B lymphocytes (or B cells). There are 5 classes of immunoglobulins; IgM,IgA,IgE,IgG and IgD.The classes of antibody diifferent both in their constant region and in their activity.IgG, the most common antibody, and is found mostly in the blood and tissue fluids, and IgA is localized in the mucous membranes which line the respiratory and gastrointestinal tracts.</span>
4 0
3 years ago
Awesome work guys keep it up please
Effectus [21]
I'd say B, anyone disagree??
5 0
3 years ago
Why aren’t the magnifications of both ocular lenses of a binocular microscope used to calculate total magnification?
shtirl [24]

Explanation:

To calculate the total magnification , of the binocular microscope -

The image of the object under observation only go via only one ocular and then travel to both our eyes ,

And the arrangement of lenses of the binocular is in way , that they are kept side - by - side and are not in a proper alignment with each other .  

3 0
3 years ago
Which type of air mass originates in northern Canada
matrenka [14]
Continental polar air mass this is the type of mass that come from northern Canada
7 0
3 years ago
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