Answer:
Bone marrow, amniotic fluid, and brain 
Explanation:
In the choices, I notice that liver is also a part of Adult stem cells but so are the ones I mentioned.
Adult stem cells are found in small numbers in most adult tissues. To not get confused by embryonic stem cell, adult stem cells are there to replace dead cells throughout the growing process of a human which is also called somatic stem cells but this type of cells helps with the brain, bone and fluid 
Hope this helped :) 
   
 
        
             
        
        
        
Enables an organism to survive.
an adaptation is a modification so that an organism can live in its environment.<span />
        
                    
             
        
        
        
Answer:
(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.
Explanation:
<em>(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.
</em>
<em>(b) X: Decomposers return carbon to the soil and release waste. Y: Producers undergo photosynthesis.
</em>
<em>(c) X: Decomposers take in carbon dioxide. Y: Producers absorb carbon through their roots.
</em>
<em>(d)X: Producers absorb carbon through their roots. Y: Decomposers take in carbon dioxide.
</em>
<u>Box 2 (X)  would be the process through which producers fix carbon dioxide to produce their own food, the carbohydrate. T</u>he process is otherwise known as photosynthesis and can be represented by the following equation:

<u>Box 4 (Y) would be the process of decomposition.</u> Both producers and consumers eventually die and decompose in the soil. During this process, some of the carbon returns to the soil as organic matters while the process of microbial decomposition releases carbon dioxide into the atmosphere.
The correct option would be (a). 
 
        
             
        
        
        
Answer:
Three Domains of Life
The scheme most often used currently divides all living organisms into five kingdoms: Monera (bacteria), Protista, Fungi, Plantae, and Animalia.
Explanation:
 
        
                    
             
        
        
        
Hey!
The correct answers for the blanks that I can answer (as a third-person answerer) are as follows: 
*No, some collisions do not cause reactions due to a lack of energy or ability to properly collide.
*Speed
*A change in temperature of the bicarbonate reaction may lead to a quicker reaction with CO2-producing molecules.
I hope I helped!
Feel free to leave a comment down below if you need any more assistance or if I skipped any sections of the prompt. I will gladly help you with anything! :)