Well first i just wanna say that life on mars has been discovered,not little green men but Bactria found on the surface and small traces of water have been found as well. some forms of life need little water to survive (like bacteria) but they still need water so yes there is water on mars the question is will we find it. 
        
             
        
        
        
The purpose of meiosis<span> is to reduce the normal diploid cells  to haploid cells, called gametes.
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Answer:
Chromosome condenses 
Pairing up to form tetrad
Crossing over 
Lining up on metaphase plate
Homologous chromosome separate 
Explanation:
Condensation of chromosomes occurs in prophase I phase. Pairing up to form tetrad occur during prophase I. Crossing over occurs during prophase I of meiosis cell division. Chromosomes line up along the metaphase plate in the stage of Metaphase. Centromeres break down and homologous chromosomes separate in anaphase I phase of meiosis.
 
        
             
        
        
        
The answer is D. all of the above