Blood cells are produced in the bone marrow and the bone marrow is part of the skeletal system. So the answer would be skeletal system<em>. </em>
        
             
        
        
        
Photosynthesis and respiration work together by creating the energy and transporting it. 
The process are similar because they both take something in, and let something else out. 
The processes complement eachother by Respiration being able to take oxygen to the leaves, and the leaves using that oxygen to power their chemical reaction. 
Good luck there friend!
 
        
             
        
        
        
Answer:
 A. distress is the correct answer.
Explanation:
Marissa suffers from panic disorder, where she experiences unpredictable, unbearable episodes of panic that closely resemble the symptoms of a heart attack.(This description of her disorder represent distress)
Panic disorder is a stress disorder described by reoccurring sudden panic attacks. 
Distress is a situation of severe stress or tension, usually caused by different factors such as failure in the exam, teasing, personal problems, loss of a job, etc.
Distress due to panic or anxiety affects a person's chance of undergoing cardiovascular problems such as stroke, heart attack, and health problems.
 Distress changes in the process of blood clots and increases the blood pressure level, weaken the heart muscle that increases the problem of heart attack.
 
        
             
        
        
        
Answer:
that the ground is damiged and there ar no new seeds 
Explanation:
 
        
                    
             
        
        
        
Answer:
There are two categories of these factors: abiotic and biotic. Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms. Abiotic factors include water, sunlight, oxygen, soil and temperature.
Explanation:
Biotic factors are interactions associated with living organisms. They can also influence the distribution of organisms in an ecosystem. grazing - too little leads to dominant plants outcompeting other species, too much reduces species numbers overall. Both decrease biodiversity.
Abiotic factors affect the ability of organisms to survive and reproduce. Abiotic limiting factors restrict the growth of populations. They help determine the types and numbers of organisms able to exist within an environment.
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