Answer:
When you breathe in, the diaphragm moves downward toward the abdomen, and the rib muscles pull the ribs upward and outward. This makes the chest cavity bigger and pulls air through the nose or mouth into the lungs.
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Answer:
The nitrogen gas must be changed to a form called nitrates, which plants can absorb through their roots. The process of changing nitrogen gas to nitrates is called nitrogen fixation. It is carried out by nitrogen-fixing bacteria. The bacteria live in soil and roots of legumes, such as peas.
 
        
             
        
        
        
Answer: cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen
Explanation:
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Answer:
The correct answers are "order; no; order; plant species A and plant species B".
Explanation:
Species are categorized in different taxonomic ranks according to physical and genetic features that establish the degree of similarity between species.  For instance, two species that are in the same order have a more recent common ancestor than two species that have the same class. Also, two species that have the same genus share the other taxonomic ranks that are in an upper section. In this case, two plants in the same family are in the same order (the next taxonomic rank) however, two plants that are in the same order not necessary are in the same family.