Sexual reproduction is a process involving the fusion of two gametes to 
 
 Gametes are special reproductive cells produced by meiosis. It produces genetically dissimilar offspring. Offspring may inherit beneficial qualities from both parents and there is a greater genetic variation in the offspring, leading to species that are better adapted to changes in the environment.
 
        
             
        
        
        
  are found along the zigzag line on the periodic table. The only exception is Aluminum. It is considered to be a metal even though it lies along the zigzag.
 
        
             
        
        
        
The sun provides the energy for photosynthesis. Cells use sugar as a source of energy. The products of cellular respiration are CO2 and H2O. These products are used by plants to make sugar and oxygen through photosynthesis.
        
             
        
        
        
Exactly how many chromosomes we are talking about depends on the species. A mosquito has 6 chromosomes, a pea plant has  14, a sunflower 34, a human being 46, and a dog 78. Closely related species tend to have a similar number of chromosomes.
 
        
             
        
        
        
The correct answer is d.) protista