Answer:
Increased fitness of large-beaked birds, leading to natural selection
(Why: Birds with larger beaks are better able to survive in the new enviornment)
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The reason why taq polymerase is used is because it is thermostable, meaning that it can remain intact and reactive after being exposed to the cycles of high temperatures that are used in PCR (an upwards of 94 degrees Celsius). If human DNA polymerase were used instead, it would immediately unfold and become inactive after the first round of high temperatures, effectively ceasing the PCR.
Answer:
A) within the lumen of the small intestine.
Explanation:
The pancreas produces a variety of hormone-like amylase, proteases, lipases which can digest the food material.
The proteases like chymotrypsinogen and trypsinogen are produced by the pancreas in their inactive form as if active will digest the organ itself. Therefore these zymogens are stored in the secretory vesicles which release the enzymes in the pancreatic duct.
These zymogens are not activated until they reach the digestive tract that is when these enzymes enter the lumen of the small intestine, the enterokinase present there catalyzes the trypsinogen to trypsin. Trypsin converts the chymotrypsinogen to the chymotrypsin.
Thus, Option-A is the correct answer.
