#Question id: 8294
#SCPH28 | Zoology
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The fourchambered hearts of birds and mammals are best described as ________.
#Question id: 241
#SCPH12 I Genetics
In DNA, phosphodiester bonds form with hydroxyl groups of carbons number ________ and ________ of each deoxyribose sugar.
#Question id: 18389
#SCPH01 Biochemistry
#Question id: 15732
#SCPH05 I Biotechnology
#Question id: 30
#SCPH28 | Zoology
Amongst the following chemical elements that are essential to organisms, which of the following set of elements have an atomic number above that of selenium?