31. This is an example of epigenetic regulation enabling unicellular organisms to respond rapidly to environmental stress . 32. Environments such as moist air, sea water and corrosive liquids and gases cause environmental stress fracture. 33. Environmental stress cracking may account for around 15-30 % of all plastic component failures in service.34. The problem is known as environmental stress cracking. 35. This definition assumes the abundant availability of all relevant nutrients and the absence of environmental stress . 36. Disturbed environments generally present low environmental stress because more resources are available than are being used. 37. Any burrowing or semiaquatic mammal would have had additional protection from K Pg boundary environmental stresses . 38. A reduction in recruitment density reduces the importance of competition for a given level of environmental stress . 39. Rather, melatonin performs important roles in plants as a growth regulator, as well as environmental stress protector. 40. These heterogeneities naturally occur in plant leaves for example during growths, various environmental stresses or pathogen infection.
