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Significance of nursery in crop production include;Production of many seedling in a smell spaceRoutine management practices are easily and timely carried outEnsures transplanting of only healthy and vigorously growing seedling.Facilitates the planting of small seed.Reduces the period of the seedling take in the seed bed.
First meiotic division is for separation of homologous chromosomes
Difference between oceans and seas is;Oceans are vast body of saline/salty water on the earth's surface that surrounds the land or continent while seas are large water bodies surrounded by land but lack connection/outlet with the oceans.
Examples of the oceans of the world are;PacificIndianArticAtlantic
Ways of water movement in oceans include;Vertical movementHorizontal