A pond fish species dealing with dramatic reductions in water temperature at night could adjust its membrane fluidity in the evening by ... a) adding trans fatty acids to its membranes. b) decreasing the chain length of the fatty acids in its membrane phospholipids. c) increasing saturase activity to reduce the number of double bonds in its membrane phospholipids. d) reducing the cholesterol content of its membranes.

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Defense Mechanism

Circumstances influence and compel people to behave in a certain way. One such behavior is a defense mechanism. It is employed by people to escape from unpleasant circumstances, thoughts and actions. Defense mechanisms are, thus, psychological strategies that help to avert and avoid unwanted feelings such as guilt or shame and situations such as threat and danger.