Prior to crossing over, in what ways are homologous chromosomes similar? In what ways do they differ?

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?