#Question id: 5570
#I Life Science/ Life Sciences Group – I-V
Sexual reproduction ________.
#Question id: 11204
#I Life Science/ Life Sciences Group – I-V
Why do Na+ ions enter the cell when voltage-gated Na+ channels are opened in neurons?
#Question id: 24446
#SCPH06 I Botany
#Question id: 454
#SCPH05 I Biotechnology
Which statement is false about most metabolic pathways?
#Question id: 8294
#SCPH05 I Biotechnology
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 ________.