Joseph Connell discovered that Balanus barnacles were excluded from the upper intertidal zone by , while Chthalamus barnacles were excluded from the middle intertidal zone by .

Male-patterned baldness is more common in males as the name suggest.why is this? a.the gene for baldness is on chromosome 5 b.the gene for baldness is on chromosome 1 c.the gene for baldness is on he x chromosome d.the gene for baldness is on the y chromosome