#Question id: 28548
#Unit 5. Developmental Biology
stem cell mediated regeneration are same as__
#Question id: 10476
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 9617
#Unit 9. Diversity of Life Forms
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed 3-chambered hearts (2 atria, 1 ventricle). Birds and mammals, however, are alike in having 4-chambered hearts (2 atria, 2 ventricles). The 4-chambered hearts of birds and mammals are best described as
#Question id: 2824
#Unit 2. Cellular Organization
Plant mitochondrial DNA
a. is the same size as human mitochondrial DNA.
b. encodes a 5S mitochondrial rRNA.
c. contains multiple copies that recombine with each other.
d. uses the standard genetic code.
#Question id: 2224
#Unit 2. Cellular Organization
Five dialysis bags, constructed of a type of membrane that is permeable to water and impermeable to sucrose, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed), and the percent change in mass of each bag was graphed.
Which line in the graph represents the bag with the highest initial concentration of sucrose?