I guess I would say b or d. Because concluded results change over time with better technology and some solutions dont work. 
        
                    
             
        
        
        
Answer:
Competition will occur between organisms in an ecosystem when their niches overlap, they both try to use the same resource and the resource is in short supply. Animals compete for food, water and space to live. Plants compete for light, water, minerals and root space.
 
        
             
        
        
        
<span>Narrow junctions and desmosomes have different structures. Narrow junctions are made of a protein arranged inside the membrane. There are many intersecting lines that cause the cells to be sealed and together. Desmosomes contain the protein cadherin. There are cadherins in each cell and they join at this point sealing the cells together, the tight junctions have the function of preventing the materials that circulate between the cells. The desmosomes provide binding sites for the cells to be attached.</span>
        
             
        
        
        
Answer:
- T. Natural Reseeding.
- D. Species Diversity
- A. Ecosystem Diversity. 
Explanation:
Natural reseeding uses natural elements and actors to plant the seeds of trees. These elements and actors include water, wind, birds, rodents and other actors capable of scattering seed. 
Species diversity is what defines the differentiation between the different species in an ecosystem and Ecosystem diversity relates to how biological communities/ ecosystems can be different from each other based on the organisms and food chains available in each. 
 
        
             
        
        
        
Answer:
It represents the first stage in the chemical oxidation of glucose by a cell.
Explanation:
Glycolysis is the first stage of oxidation of glucose by the process of cellular respiration. Glycolysis includes the breakdown of one molecule of glucose into two molecules of pyruvate. Substrate level phosphorylation forms net 2 ATP molecules and the redox reactions of glycolysis uses NAD+ as an electron acceptor resulting in the formation of 2 NADH. 
Therefore, one molecule of glucose obtains 2 pyruvate molecules, 2ATP and 2 NADH by glycolysis. The fate of pyruvate depends on the availability of oxygen. Citric acid cycle and oxidative phosphorylation are the next two stages of aerobic cellular respiration.