In the f2 generation of mendel’s crosses, a. all plants had the dominant trait. b. half of the plants had the dominant allelec. all plants had both the dominant and recessive alleles. d.one in four plants had two alleles for the recessive trait.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)