Read the passage and answer the questions that follow by choosing the correct answer a, b, c or d. -> only one answer is correct. Everyone is familiar with the rigidity of instinct in insect. Worker ants emerge from their pupal case equipped not with the instincts to care for ant grubs in general, but solely with those suited to ant grubs of their own species. They will attempt to care for the grubs of other species, but appear incapable of learning new methods of their instincts kill their foster children. But even in the fine flowers of vertebrate evolution, the birds and mammals, behaviour, though it may be more plastic than in the insects, is as essentially irrational. Birds, for instance, seem incapable of analyzing unfamiliar situations. For them some element in the situation may act as its dominant symbol, the only stimulus to which they can react. At other times it is the organization of the situation as a whole which is the stimulus: if the whole is interfered with, analysis fails to dissect out the essential element. Mammals are no better. A cow deprived of its calf will be quieted by a crudely stuffed calfskin. Even the primates are no exception. Female baboons whose offsprings have died will continue carrying the corpses until they have not merely putrefied but mummified. This appears to be due not to any depth of grief, but to a contact stimulus the mother will react similarly to any moderately small and furry object. 86. The author states that instinctive behaviour is basically... a. irrational b. analytical c. plastic d. destructive 87. The worker ant is used to illustrate the... a. difference between insects and mammals b. destructiveness of instinctive behavior c. rigidity of insective behavior d. adaptability of the species 88. The author wishes to show that the cow and the baboon care for their offspring because of their... a. great mother love b. instinctive reactions c. dissection of the essential element d. deep grief 89. The author states that the stimulus to which a bird reacts is... a. the essential element b. an essentially irrational element c. an irrational organization of the situation as a whole d. either a dominant symbol or the situation as a whole 90. The author states that the behavior of birds and mammals, as compared to that of insects, is... a. less rigid b. more organized c. less irrational d. less destructive