Trypsinogen is split by the enzyme enterokinase to form an activated molecule of the protease trypsin. which of the following would confirm that the activation of trypsin is an example of how a positive feedback mechanism can amplify a biological process?
a) the activated trypsin enzyme can use enterokinase as a substrate
b) the trypsin produced by the reaction is capable of splitting and activating additional trypsinogen molecules
c) if levels of trypsin were to get too high, the trypsin molecules would inhibit the enzyme enterokinase
d) each mrna molecule that codes for trypsinogen can be translated repeatedly to form many peptide molecules

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )