Answer:
leukocyte
Explanation:
leukocyte is the organelle missing in the red blood cell. 
 
        
             
        
        
        
Answer:
Here, is the question with the explanations to pick from to complete the question
Tropical rainforests have high species richness of trees. Which of the following statements provides the MOST reasonable explanation why animal species richness is also high in tropical rainforests?
Animals are unable to adapt to climate variability in higher latitudes.
Animals have had the same amount of time to evolve in rainforest areas as trees.
Animal diversification rates are higher than those of trees.
Animals have diversified into the vast number of niches provided by tree diversity
The last option is the most reasonable one
Our answer is:
Animals have diversified into the vast number of niches provided by tree
Explanation:
The reason is that a lot of species are highly specialized to occupy a particular niche. Where that favourable niche exists, the population of that species increases as its offspring colonize new areas.
 
        
             
        
        
        
True, pulmonary arteries carry the blood from the heart, while pulmonary veins return the blood to the heart.
        
                    
             
        
        
        
Gyri form the top of the ridges, while sulci form the " valley" of the ridges.
        
             
        
        
        
a) talc  Most people are familiar with the mineral talc. It can be crushed into a white powder that is widely known as "talcum powder." This powder has the ability to absorb moisture, absorb oils, absorb odor, serve as a lubricant, and produce an astringent effect with human skin.