#Question id: 14511
#Unit 13. Methods in Biology
#Question id: 23104
#Unit 2. Cellular Organization
#Question id: 8294
#Unit 9. Diversity of Life Forms
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: 11495
#Unit 7. System Physiology – Animal
In a neuron with a resting membrane potential of −65mV, the distribution of which ion across the neuronal membrane represents the greatest potential electromotive force (EMF)?
#Question id: 15252
#Unit 2. Cellular Organization