8. Select two sentences from Passage 2 that support the inference that researchers are unsure of the effect that clicking moths have on bats.
"As a bat zips through the night sky, it sends out high-pitched
squeaks, bouncing sound waves off of objects and unsuspecting
prey." (paragraph 5)
"While most insect victims would have trouble fighting back, many
dive and loop to avoid enemies, and some have the added advantage
of being poisonous." (paragraph 5)
"Tiger moths have a special clicker called a tymbal built into their
thorax." (paragraph 6)
"Scientists have proposed a few reasons for the tymbal's success,
ranging from its potential to startle a bat to its possible role as a
'jammer' that garbles the bats' hunting squeaks." (paragraph 6)
"The bat may recognize the clicks from the 11,000 tiger moth
species, learning to avoid the critters after an initial bout of food
poisoning." (paragraph 7)