Together the insulin and glucagon help maintain a state is known as homeostasis in which conditions inside the body remain steady. 
<h3>
What is homeostasis?</h3>
Homeostasis refers to the mechanism of the body to maintain a stable internal environment instead of changes taking place in the external environment.
When blood sugar is too high, the pancreas secretes more insulin. When blood sugar levels drop, the pancreas releases glucagon to raise them.
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I think the answer to this is D. 
        
                    
             
        
        
        
True.
The earth is made of several subsystems or spheres that interact to form a complex and continuously changing (dynamic) state that is termed as the earth system.
Even though the earth system is a closed system, it self regulates through the subsystems  such as the water cycle and  carbon cycle. 
The earth system is characterized by numerous overlapping cycles in which matter is recycled  over and over again. Cycles involve multiple spheres and systems interactions. Humans impact and are impacted by the cycles in various ways.
 
        
             
        
        
        
Answer:
Plants have two distinct stages in their lifecycle: the gametophyte stage and the sporophyte stage. After reaching maturity, the diploid sporophyte produces spores by meiosis, which in turn divide by mitosis to produce the haploid gametophyte. The new gametophyte produces gametes, and the cycle continues.
Explanation:
 
        
                    
             
        
        
        
Desert ecosystems. 
Explanation
It’s very dry in the Southwest. They get hardly any precipitation and it’s very hot.