This is because butterfly caterpillars are host specific. Plant-wise, the caterpillars of some butterfly species like asters, black-eyed Susan, clover, lupines, milkweed, sedum or violets. Aspen, birch, cherry, hackberry, oak or willow trees make caterpillars of other butterfly species equally happy.
each Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.ach Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.
The preferred geometry of molecule BrF3 or bromine trifluoride is a  planar T-shaped molecule. This is due to the two lone pairs of  electrons on bromine, which cause a re â¦ pulsion from the fluorine  atoms.Answered. In Science.he preferred geometry of molecule BrF3 or bromine trifluoride is a  planar T-shaped molecule. This is due to the two lone pairs of  electrons on bromine, which cause a re â¦ pulsion from the fluorine  atoms. Answered.