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 four- chambered hearts of birds and mammals are best described as .
Answers: 2
Biology, 22.06.2019 10:50
The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.
Answers: 1
Biology, 22.06.2019 13:00
This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient
Answers: 1
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly po...
Chemistry, 04.02.2020 09:03
Social Studies, 04.02.2020 09:03
Mathematics, 04.02.2020 09:04
English, 04.02.2020 09:04
History, 04.02.2020 09:04
Mathematics, 04.02.2020 09:04
English, 04.02.2020 09:04
Mathematics, 04.02.2020 09:04
Mathematics, 04.02.2020 09:04
Mathematics, 04.02.2020 09:04