Another name for unicellular organisms that dominated Earth up to the Precambrian time is prokaryotes. The correct answer is D. 
        
                    
             
        
        
        
Answer:
O H20 and CH4, but not O2
Explanation:
Compounds consist of multiple elements. O2 is just two oxygen atoms, meaning two atoms from the same element.
 
        
             
        
        
        
The gametophyte of a liverwort produces sperm in a structure called <span>antheridium.
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An antheridium<span> or antherida (plural: </span>antheridia<span>) is a </span>haploid<span> structure or organ producing and containing male </span>gametes<span> which is called </span>antherozoids<span> or </span>sperm<span>.</span>
        
                    
             
        
        
        
the answer for this question is the distance of the star from sun using parallax method 
 
        
                    
             
        
        
        
Answer:
If the sun was farther away from Earth
Explanation: