Final answer:
Semelparity is a life history strategy in which a species reproduces only once in its lifetime and then dies. It is favored when the external environment has high adult mortality compared to juvenile mortality. Examples include bamboo and the Chinook salmon.
Step-by-step explanation:
Semelparity is a life history strategy in which a species reproduces only once in its lifetime and then dies. This strategy is favored when the external environment has high adult mortality compared to juvenile mortality, and mature individuals are unlikely to survive much longer. Examples of semelparity include bamboo and the Chinook salmon. These species use most of their resources for a single reproductive event, sacrificing their survival for reproduction.