Identify whether each of the following is a biotic or abiotic factor. bear: rock: dead log: grass: sunlight: a bear on a dead log with water and grass or trees photo courtesy of us fish and wildfire service headquarters

Bear- biotic, rock- abiotic, dead log- abiotic, grass - biotic , sunlight - abiotic

Explanation:

Any living cell, tissue or organism is considered as biotic components of a ecosystem and those that do not posses the characteristics of living organisms are abiotic which includes dead logs once they are dead.

enzymes loose their form in both unsuitable ph and temprature.

Explanation:

at very high tempratures enzyme molecules denatures due to high speed movements, at low tempratures enzymes works too slow to be useful enough.

low ph solotions contain lot of H+  and high ph solutions have few H+ , and the number of these H+ ions have polar effects on enzymes.  some Enzymes like pepsin works perfect in acidic environment ( ph=2)  while others might work at  high ph  or average ph( like Trypsin  works well at ph=7).