Color blindness is a sex-linked recessive trait. a mother with normal color vision and a color blind father have a color blind daughter. which statement is true about the offspring? a) all of their daughters must be color blind. b) some of their sons can have normal color vision. c) all of their sons will carry a gene for color blindness. d) none of their daughters will carry a gene for color blindness.

Im going to say B because process of elimination

The mom normal vision so  their future daughters may end up with the non color blind gene, again the future sons may end up without the gene since the mother does not have it and only has one on one x and d is just false because they already had a daughter with it.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.