Predation D Competition
PARTC
A +/- relationship between two species would be considered which type of symbiosis:
A Mutualism
B
Commensalism
Parasitism
D Predation

Prior knowledge can be gained from personal experience and a) forming well-developed hypotheses. b) listening to opinions of other people on a topic. c) researching previous experiments and results on a topic. eliminate d) no other methods. it can only be gained by personal experience.