State the importance of the following responses
(a) chemo-taxis in pollen grains
(b) positive rheotaxis in butterfly

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .