Two species of hummingbird want the same flowers. This is an example of what kind of ecological pressure?

COMPETITION MAYBE

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.