The correct answer is C.) Conifers release pollen grains.
Conifers are gymnosperms which produces naked seeds. Conifers reproduces sexually by producing male and female cones. Male cones are produced in cluster. Male cones contains many microsporangia. In microsporangia have microspore mother cells which undergo meiosis to produce microspores or pollen grains. Pollen grains are release from male cone.    
 
        
             
        
        
        
Hi the release of Pressure from a rock is one example of an agent of physical Weathering.
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The correct answer would be C. both types of energy pyramids contain the same species of organisms. This would be the incorrect one because aquatic and terrestrial ecosystems do NOT have the same organisms living in them.
        
                    
             
        
        
        
They all contribute to genetic diversity, alternative D.
        
                    
             
        
        
        
Answer:b. cellulose; cell walls of plants
Explanation: polysaccharides are polymers of monossacharides.they are the most abundant organic substance.it is found in the cell walls of plants . cellulose is a linear polymer of glucose residues.cellulose is an important component in the diet of herbivores and omnivores.they do not produce the cellulase enzyme for digesting cellulose.as a result,they depend on symbiotic relationship with bacteria and protozoa found in their stomach to produce cellulase.