The process that produces oxygen
is the photosynthesis and when oxygen is released as the result of its production during
photosynthesis, it is a
by-product of splitting the water molecules. The reduction of oxygen which forms water occurs during
respiration.
 
        
             
        
        
        
Answer: diversity of niches
, large area and warm climate
Explanation:
An ecosystem is a biotic community in which the living beings interact with their non-living physical environment. The following factors which are responsible for higher biodiversity in an ecosystem:
Diversity of niches: A niche can be define as the functional role an organism performs in an ecosystem so as to sustain it's life. For example the type of habitat, food and breeding season chosen by the organism. With the increase in the differences in the diversity of niches the organism exhibit variations and differences from the members of the same species or from the members of the other species.
Large area: The large area can support the reproduction and abundance of members which belongs to different species hence will help in promoting higher biodiversity in a region. 
Warm climate: The warm climatic range will offer the chances of adaptations to the living organisms to sustain their lives in harsh environmental conditions. This will lead to evolution of  new species from the parent species. 
 
        
                    
             
        
        
        
The process where a specie develops and evolves into new many species is termed as speciation. Macroevolution explores the mechanism of speciation where organisms across biological populations evolve as distinct population. 
There are many causes to speciation, a) geographic isolation, b) gene flow reduction, and c) reproductive isolation. 
        
             
        
        
        
White flowers would be recessive and purple would be dominant
(ps capital letters show the dominant genes and lowercase are usually the recessive)
 
        
             
        
        
        
It is the B the Arbor Vitae