#Question id: 3436
#SCPH06 I Botany
Loss of responsiveness to stimuli that convey little or no new information is called
#Question id: 19127
#SCPH01 Biochemistry
#Question id: 22953
#I Life Science/ Life Sciences Group – I-V
#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: 5051
#SCPH06 I Botany
fter the 8-cell stage, the mammalian embryo develops an outer layer (which becomes the fetal portion of the placenta), and an inner cell mass that generates all the cells of embryo. The cells of the inner cell mass are thus said to be-