How are genes and alleles related to genotypes and phenotype ?

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms

Brian made this table to organize his notes on changes of state change of state energy change melting gain freezing lose deposition gain condensation lose

If people from georgia have just experienced an extremely cold winter the last couple of months, what would the climate most likely be classified as? polar temperate maritime tropical