Final answer:
An r-strategist is characterized by density-independent mortality, having many small offspring, with little parental care, adapted to unpredictable environments such as marine invertebrates and dandelions.
Step-by-step explanation:
An r-strategist is characterized by density-independent mortality. These species have large numbers of small offspring and are adapted to unstable and unpredictable environments. They reproduce quickly and do not provide a lot of resources or parental care to their offspring. Examples of r-strategists include marine invertebrates like jellyfish and plants like dandelions. These characteristics are in contrast to K-selected species, which are adapted to stable environments and invest more heavily in fewer offspring.