The mass extinction that led to the dinosaurs' demise around 65 million years ago is thought by many to be the result of a large asteroid impact near present day
A) Iceland. B) Hawaii. C) Siberia. D) Manitoba. E) Yucatan.
The β-globin gene superfamily has three major components located on three separate chromosomes in humans.They are the β-globin gene family,the ______________________ gene family,and the myoglobin gene.
A) α-globin B) Hba-ps4 C) gamma globulin D) delta globin E) leghemoglobin