<span>it can form four covalent bonds it forms very strong bonds
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Im going to guess either c or d
        
                    
             
        
        
        
Answer: they both have a:
Nucleus. The nucleus can be thought of as the cell's headquarters.
Plasma membrane. To ensure each cell remains separate from its neighbor, it is enveloped in a special membrane known as the plasma membrane.
Cytoplasm. 
Lysosomes and peroxisomes.
Cytoskeleton. 
Endoplasmic reticulum. 
Golgi apparatus. 
Mitochondria.
 
        
             
        
        
        
Answer:
Carbon Dioxide or CO2 is removed from atomsphere by trees and other plants through photosynthesis.