Question

4. Which of the following is the reason jams and dried meats often do not require

refrigeration to prevent spoilage?
a) low pH
b) toxic alkaline chemicals
c) naturally occurring antibiotics
d) low water activity
5. Bacteria living in salt marshes are most likely which of the following?
a) acidophiles
b) barophiles
c) halotolerant
d) thermophiles

Answer 1

Jams and dried meats often do not require refrigeration due to low water activity, while bacteria living in salt marshes are typically halotolerant.

Step-by-step explanation:

The reason jams and dried meats often do not require refrigeration to prevent spoilage is option d) low water activity. Low water activity means that there is less available water for microbial growth, which reduces the likelihood of spoilage. Jams have a high sugar content, which lowers the water activity. Dried meats have undergone a dehydration process that reduces the water content, thus lowering the water activity as well.

Bacteria living in salt marshes are most likely option c) halotolerant. Halotolerant bacteria can tolerate high salt concentrations and are adapted to live in such environments, like salt marshes. They are capable of surviving in conditions with high salt levels.

Learn more about Food Preservation and Bacteria Adaptation