ajkeefe

Shouldn't there be a nearly infinite number of, for example, ecoli bacteria? Given mutation rates, wouldnt bacteria separated by something as simple as a river speciate within a thousand years or something? My genetics book keeps using examples from ecoli but I can't help but wonder how they can describe molecular processes so generally across all ecoli. Thanks!

We are studying vacular architechture and general histology. What should I look for? What are some common liver pathologies? Feel free to mention anything, even if its obvious. Thanks!

Blood flows from the portal vein inward towards the central vein. Thus the tissue around the central vein gets the last picking from the blood. 27 minutes discusses this. Great video too hope this helps!