page 14 21. The diagram shows the breeding of two parental pig breeds to produce the Modern Duroc pig. Modern Duroc Brown Duroc × Jersey Red The Modern Duroc pig has increased quality and quantity of meat compared to both parental breeds. The development of the Modern Duroc pig breed is an example of A inbreeding B cross breeding C natural selection D genetic modification. 22. A study into animal welfare in a zoo was carried out by observing the behaviour of some of the animals in their enclosures. The behaviours observed are shown in the table. Animal Behaviour Lion Continuously pacing back and forward Sun bear Feeding young Spider monkey Subordinate monkey grooming the dominant male White rhino Repeatedly chewing bars of enclosure Spotted hyena Sleeping in the sun Which two animals show signs of poor welfare? A Spotted hyena and lion B White rhino and spider monkey C Lion and white rhino D Sun bear and spider monkey